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Finding the Fourth Proportional to 1,001.64, 1,502.40 and 385.65

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Solution

The fourth proportional to 1,001.64, 1,502.40 and 385.65 is: 578.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.64 : 1,502.40 = 385.65 : x
  2. Step 2: Convert to fraction form
    1,001.64/1,502.40 = 385.65/x
  3. Step 3: Cross multiply
    1,001.64x = 1,502.40 × 385.65
  4. Step 4: Simplify right side
    1,001.64x = 579,400.56
  5. Step 5: Solve for x
    x = 579,400.56/1,001.64
  6. Step 6: Final answer
    x = 578.45

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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.