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Finding the Fourth Proportional to 291,487.16, 402,438 and 237,900

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Solution

The fourth proportional to 291,487.16, 402,438 and 237,900 is: 328,453.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,487.16 : 402,438 = 237,900 : x
  2. Step 2: Convert to fraction form
    291,487.16/402,438 = 237,900/x
  3. Step 3: Cross multiply
    291,487.16x = 402,438 × 237,900
  4. Step 4: Simplify right side
    291,487.16x = 95,740,000,200
  5. Step 5: Solve for x
    x = 95,740,000,200/291,487.16
  6. Step 6: Final answer
    x = 328,453.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.