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Finding the Fourth Proportional to 973.20, 1,459.36 and 314.88

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Solution

The fourth proportional to 973.20, 1,459.36 and 314.88 is: 472.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.20 : 1,459.36 = 314.88 : x
  2. Step 2: Convert to fraction form
    973.20/1,459.36 = 314.88/x
  3. Step 3: Cross multiply
    973.20x = 1,459.36 × 314.88
  4. Step 4: Simplify right side
    973.20x = 459,523.28
  5. Step 5: Solve for x
    x = 459,523.28/973.20
  6. Step 6: Final answer
    x = 472.18

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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.