Home / 808,613.70-1,212,920.55-509,432.10

Finding the Fourth Proportional to 808,613.70, 1,212,920.55 and 509,432.10

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Solution

The fourth proportional to 808,613.70, 1,212,920.55 and 509,432.10 is: 764,148.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,613.70 : 1,212,920.55 = 509,432.10 : x
  2. Step 2: Convert to fraction form
    808,613.70/1,212,920.55 = 509,432.10/x
  3. Step 3: Cross multiply
    808,613.70x = 1,212,920.55 × 509,432.10
  4. Step 4: Simplify right side
    808,613.70x = 617,900,662,919.66
  5. Step 5: Solve for x
    x = 617,900,662,919.66/808,613.70
  6. Step 6: Final answer
    x = 764,148.15

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Double scale
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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.