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Finding the Fourth Proportional to 778.32, 1,073.48 and 501.84

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Solution

The fourth proportional to 778.32, 1,073.48 and 501.84 is: 692.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    778.32 : 1,073.48 = 501.84 : x
  2. Step 2: Convert to fraction form
    778.32/1,073.48 = 501.84/x
  3. Step 3: Cross multiply
    778.32x = 1,073.48 × 501.84
  4. Step 4: Simplify right side
    778.32x = 538,715.20
  5. Step 5: Solve for x
    x = 538,715.20/778.32
  6. Step 6: Final answer
    x = 692.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.