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Finding the Fourth Proportional to 389,617.80, 584,426.70 and 373,871.40

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Solution

The fourth proportional to 389,617.80, 584,426.70 and 373,871.40 is: 560,807.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,617.80 : 584,426.70 = 373,871.40 : x
  2. Step 2: Convert to fraction form
    389,617.80/584,426.70 = 373,871.40/x
  3. Step 3: Cross multiply
    389,617.80x = 584,426.70 × 373,871.40
  4. Step 4: Simplify right side
    389,617.80x = 218,500,428,526.38
  5. Step 5: Solve for x
    x = 218,500,428,526.38/389,617.80
  6. Step 6: Final answer
    x = 560,807.10

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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.