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Finding the Fourth Proportional to 1,039.28, 1,557.76 and 462.08

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Solution

The fourth proportional to 1,039.28, 1,557.76 and 462.08 is: 692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.28 : 1,557.76 = 462.08 : x
  2. Step 2: Convert to fraction form
    1,039.28/1,557.76 = 462.08/x
  3. Step 3: Cross multiply
    1,039.28x = 1,557.76 × 462.08
  4. Step 4: Simplify right side
    1,039.28x = 719,809.74
  5. Step 5: Solve for x
    x = 719,809.74/1,039.28
  6. Step 6: Final answer
    x = 692.60

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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.