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Finding the Fourth Proportional to 972.79, 1,459.19 and 356.50

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Solution

The fourth proportional to 972.79, 1,459.19 and 356.50 is: 534.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.79 : 1,459.19 = 356.50 : x
  2. Step 2: Convert to fraction form
    972.79/1,459.19 = 356.50/x
  3. Step 3: Cross multiply
    972.79x = 1,459.19 × 356.50
  4. Step 4: Simplify right side
    972.79x = 520,203.95
  5. Step 5: Solve for x
    x = 520,203.95/972.79
  6. Step 6: Final answer
    x = 534.76

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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.