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Finding the Fourth Proportional to 972.10, 1,456.54 and 509.19

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Solution

The fourth proportional to 972.10, 1,456.54 and 509.19 is: 762.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.10 : 1,456.54 = 509.19 : x
  2. Step 2: Convert to fraction form
    972.10/1,456.54 = 509.19/x
  3. Step 3: Cross multiply
    972.10x = 1,456.54 × 509.19
  4. Step 4: Simplify right side
    972.10x = 741,655.60
  5. Step 5: Solve for x
    x = 741,655.60/972.10
  6. Step 6: Final answer
    x = 762.94

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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.