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Finding the Fourth Proportional to 389,091.60, 583,637.40 and 372,502.80

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Solution

The fourth proportional to 389,091.60, 583,637.40 and 372,502.80 is: 558,754.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,091.60 : 583,637.40 = 372,502.80 : x
  2. Step 2: Convert to fraction form
    389,091.60/583,637.40 = 372,502.80/x
  3. Step 3: Cross multiply
    389,091.60x = 583,637.40 × 372,502.80
  4. Step 4: Simplify right side
    389,091.60x = 217,406,565,684.72
  5. Step 5: Solve for x
    x = 217,406,565,684.72/389,091.60
  6. Step 6: Final answer
    x = 558,754.20

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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.