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Finding the Fourth Proportional to 607,613.40, 911,420.10 and 430,320.60

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Solution

The fourth proportional to 607,613.40, 911,420.10 and 430,320.60 is: 645,480.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,613.40 : 911,420.10 = 430,320.60 : x
  2. Step 2: Convert to fraction form
    607,613.40/911,420.10 = 430,320.60/x
  3. Step 3: Cross multiply
    607,613.40x = 911,420.10 × 430,320.60
  4. Step 4: Simplify right side
    607,613.40x = 392,202,844,284.06
  5. Step 5: Solve for x
    x = 392,202,844,284.06/607,613.40
  6. Step 6: Final answer
    x = 645,480.90

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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.