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Finding the Fourth Proportional to 402,547.80, 603,821.70 and 253,248.60

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Solution

The fourth proportional to 402,547.80, 603,821.70 and 253,248.60 is: 379,872.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,547.80 : 603,821.70 = 253,248.60 : x
  2. Step 2: Convert to fraction form
    402,547.80/603,821.70 = 253,248.60/x
  3. Step 3: Cross multiply
    402,547.80x = 603,821.70 × 253,248.60
  4. Step 4: Simplify right side
    402,547.80x = 152,917,000,174.62
  5. Step 5: Solve for x
    x = 152,917,000,174.62/402,547.80
  6. Step 6: Final answer
    x = 379,872.90

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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.