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Finding the Fourth Proportional to 1,001.40, 1,501.12 and 400.15

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Solution

The fourth proportional to 1,001.40, 1,501.12 and 400.15 is: 599.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.40 : 1,501.12 = 400.15 : x
  2. Step 2: Convert to fraction form
    1,001.40/1,501.12 = 400.15/x
  3. Step 3: Cross multiply
    1,001.40x = 1,501.12 × 400.15
  4. Step 4: Simplify right side
    1,001.40x = 600,665.69
  5. Step 5: Solve for x
    x = 600,665.69/1,001.40
  6. Step 6: Final answer
    x = 599.83

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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.