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Finding the Fourth Proportional to 657,655.50, 907,565.40 and 355,849.50

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Solution

The fourth proportional to 657,655.50, 907,565.40 and 355,849.50 is: 491,072.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,655.50 : 907,565.40 = 355,849.50 : x
  2. Step 2: Convert to fraction form
    657,655.50/907,565.40 = 355,849.50/x
  3. Step 3: Cross multiply
    657,655.50x = 907,565.40 × 355,849.50
  4. Step 4: Simplify right side
    657,655.50x = 322,956,693,807.30
  5. Step 5: Solve for x
    x = 322,956,693,807.30/657,655.50
  6. Step 6: Final answer
    x = 491,072.75

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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.