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Finding the Fourth Proportional to 425,502.65, 638,256.04 and 125,988.89

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Solution

The fourth proportional to 425,502.65, 638,256.04 and 125,988.89 is: 188,983.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,502.65 : 638,256.04 = 125,988.89 : x
  2. Step 2: Convert to fraction form
    425,502.65/638,256.04 = 125,988.89/x
  3. Step 3: Cross multiply
    425,502.65x = 638,256.04 × 125,988.89
  4. Step 4: Simplify right side
    425,502.65x = 80,413,166,509.14
  5. Step 5: Solve for x
    x = 80,413,166,509.14/425,502.65
  6. Step 6: Final answer
    x = 188,983.94

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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.