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Finding the Fourth Proportional to 389,637.40, 584,475.30 and 203,013.40

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Solution

The fourth proportional to 389,637.40, 584,475.30 and 203,013.40 is: 304,530.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,637.40 : 584,475.30 = 203,013.40 : x
  2. Step 2: Convert to fraction form
    389,637.40/584,475.30 = 203,013.40/x
  3. Step 3: Cross multiply
    389,637.40x = 584,475.30 × 203,013.40
  4. Step 4: Simplify right side
    389,637.40x = 118,656,317,869.02
  5. Step 5: Solve for x
    x = 118,656,317,869.02/389,637.40
  6. Step 6: Final answer
    x = 304,530.10

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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.