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Finding the Fourth Proportional to 308,318.34, 425,547.90 and 187,434

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Solution

The fourth proportional to 308,318.34, 425,547.90 and 187,434 is: 258,700.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,318.34 : 425,547.90 = 187,434 : x
  2. Step 2: Convert to fraction form
    308,318.34/425,547.90 = 187,434/x
  3. Step 3: Cross multiply
    308,318.34x = 425,547.90 × 187,434
  4. Step 4: Simplify right side
    308,318.34x = 79,762,145,088.60
  5. Step 5: Solve for x
    x = 79,762,145,088.60/308,318.34
  6. Step 6: Final answer
    x = 258,700.62

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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.