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Finding the Fourth Proportional to 1,073, 1,480.73 and 631.15

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Solution

The fourth proportional to 1,073, 1,480.73 and 631.15 is: 870.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,073 : 1,480.73 = 631.15 : x
  2. Step 2: Convert to fraction form
    1,073/1,480.73 = 631.15/x
  3. Step 3: Cross multiply
    1,073x = 1,480.73 × 631.15
  4. Step 4: Simplify right side
    1,073x = 934,562.74
  5. Step 5: Solve for x
    x = 934,562.74/1,073
  6. Step 6: Final answer
    x = 870.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.