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Finding the Fourth Proportional to 457,669.40, 686,504.10 and 426,565.40

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Solution

The fourth proportional to 457,669.40, 686,504.10 and 426,565.40 is: 639,848.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,669.40 : 686,504.10 = 426,565.40 : x
  2. Step 2: Convert to fraction form
    457,669.40/686,504.10 = 426,565.40/x
  3. Step 3: Cross multiply
    457,669.40x = 686,504.10 × 426,565.40
  4. Step 4: Simplify right side
    457,669.40x = 292,838,896,018.14
  5. Step 5: Solve for x
    x = 292,838,896,018.14/457,669.40
  6. Step 6: Final answer
    x = 639,848.10

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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.