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Finding the Fourth Proportional to 402,419.70, 603,629.55 and 260,702.10

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Solution

The fourth proportional to 402,419.70, 603,629.55 and 260,702.10 is: 391,053.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,419.70 : 603,629.55 = 260,702.10 : x
  2. Step 2: Convert to fraction form
    402,419.70/603,629.55 = 260,702.10/x
  3. Step 3: Cross multiply
    402,419.70x = 603,629.55 × 260,702.10
  4. Step 4: Simplify right side
    402,419.70x = 157,367,491,307.06
  5. Step 5: Solve for x
    x = 157,367,491,307.06/402,419.70
  6. Step 6: Final answer
    x = 391,053.15

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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.