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Finding the Fourth Proportional to 576,415.28, 864,654.45 and 239,490

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Solution

The fourth proportional to 576,415.28, 864,654.45 and 239,490 is: 359,248.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,415.28 : 864,654.45 = 239,490 : x
  2. Step 2: Convert to fraction form
    576,415.28/864,654.45 = 239,490/x
  3. Step 3: Cross multiply
    576,415.28x = 864,654.45 × 239,490
  4. Step 4: Simplify right side
    576,415.28x = 207,076,094,230.50
  5. Step 5: Solve for x
    x = 207,076,094,230.50/576,415.28
  6. Step 6: Final answer
    x = 359,248.10

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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.