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Finding the Fourth Proportional to 606,985.20, 910,391.40 and 207,644.40

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Solution

The fourth proportional to 606,985.20, 910,391.40 and 207,644.40 is: 311,437.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,985.20 : 910,391.40 = 207,644.40 : x
  2. Step 2: Convert to fraction form
    606,985.20/910,391.40 = 207,644.40/x
  3. Step 3: Cross multiply
    606,985.20x = 910,391.40 × 207,644.40
  4. Step 4: Simplify right side
    606,985.20x = 189,037,676,018.16
  5. Step 5: Solve for x
    x = 189,037,676,018.16/606,985.20
  6. Step 6: Final answer
    x = 311,437.04

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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.