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Finding the Fourth Proportional to 638,765.40, 958,148.10 and 587,155.80

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Solution

The fourth proportional to 638,765.40, 958,148.10 and 587,155.80 is: 880,733.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,765.40 : 958,148.10 = 587,155.80 : x
  2. Step 2: Convert to fraction form
    638,765.40/958,148.10 = 587,155.80/x
  3. Step 3: Cross multiply
    638,765.40x = 958,148.10 × 587,155.80
  4. Step 4: Simplify right side
    638,765.40x = 562,582,214,173.98
  5. Step 5: Solve for x
    x = 562,582,214,173.98/638,765.40
  6. Step 6: Final answer
    x = 880,733.70

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Double scale
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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.