Home / 638,748.90-958,123.35-587,139.30

Finding the Fourth Proportional to 638,748.90, 958,123.35 and 587,139.30

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Solution

The fourth proportional to 638,748.90, 958,123.35 and 587,139.30 is: 880,708.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,748.90 : 958,123.35 = 587,139.30 : x
  2. Step 2: Convert to fraction form
    638,748.90/958,123.35 = 587,139.30/x
  3. Step 3: Cross multiply
    638,748.90x = 958,123.35 × 587,139.30
  4. Step 4: Simplify right side
    638,748.90x = 562,551,873,032.66
  5. Step 5: Solve for x
    x = 562,551,873,032.66/638,748.90
  6. Step 6: Final answer
    x = 880,708.95

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Half scale
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Double scale
Find fourth proportional to 638,749.90, 958,124.85 and 587,140.30
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.