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Finding the Fourth Proportional to 929.18, 1,385.22 and 885.44

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Solution

The fourth proportional to 929.18, 1,385.22 and 885.44 is: 1,320.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.18 : 1,385.22 = 885.44 : x
  2. Step 2: Convert to fraction form
    929.18/1,385.22 = 885.44/x
  3. Step 3: Cross multiply
    929.18x = 1,385.22 × 885.44
  4. Step 4: Simplify right side
    929.18x = 1,226,529.20
  5. Step 5: Solve for x
    x = 1,226,529.20/929.18
  6. Step 6: Final answer
    x = 1,320.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.