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Finding the Fourth Proportional to 390,671.64, 586,001.37 and 124,429.91

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Solution

The fourth proportional to 390,671.64, 586,001.37 and 124,429.91 is: 186,642.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,671.64 : 586,001.37 = 124,429.91 : x
  2. Step 2: Convert to fraction form
    390,671.64/586,001.37 = 124,429.91/x
  3. Step 3: Cross multiply
    390,671.64x = 586,001.37 × 124,429.91
  4. Step 4: Simplify right side
    390,671.64x = 72,916,094,798.97
  5. Step 5: Solve for x
    x = 72,916,094,798.97/390,671.64
  6. Step 6: Final answer
    x = 186,642.92

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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.