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Finding the Fourth Proportional to 972.95, 1,459.61 and 315

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Solution

The fourth proportional to 972.95, 1,459.61 and 315 is: 472.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.95 : 1,459.61 = 315 : x
  2. Step 2: Convert to fraction form
    972.95/1,459.61 = 315/x
  3. Step 3: Cross multiply
    972.95x = 1,459.61 × 315
  4. Step 4: Simplify right side
    972.95x = 459,775.58
  5. Step 5: Solve for x
    x = 459,775.58/972.95
  6. Step 6: Final answer
    x = 472.56

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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.