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Finding the Fourth Proportional to 657,384.78, 986,636.70 and 258,304.62

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Solution

The fourth proportional to 657,384.78, 986,636.70 and 258,304.62 is: 387,676.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,384.78 : 986,636.70 = 258,304.62 : x
  2. Step 2: Convert to fraction form
    657,384.78/986,636.70 = 258,304.62/x
  3. Step 3: Cross multiply
    657,384.78x = 986,636.70 × 258,304.62
  4. Step 4: Simplify right side
    657,384.78x = 254,852,817,871.55
  5. Step 5: Solve for x
    x = 254,852,817,871.55/657,384.78
  6. Step 6: Final answer
    x = 387,676.78

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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.