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Finding the Fourth Proportional to 646,995.20, 970,492.80 and 423,046.40

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Solution

The fourth proportional to 646,995.20, 970,492.80 and 423,046.40 is: 634,569.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,995.20 : 970,492.80 = 423,046.40 : x
  2. Step 2: Convert to fraction form
    646,995.20/970,492.80 = 423,046.40/x
  3. Step 3: Cross multiply
    646,995.20x = 970,492.80 × 423,046.40
  4. Step 4: Simplify right side
    646,995.20x = 410,563,485,265.92
  5. Step 5: Solve for x
    x = 410,563,485,265.92/646,995.20
  6. Step 6: Final answer
    x = 634,569.60

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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.