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Finding the Fourth Proportional to 929.02, 1,394.40 and 621.10

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Solution

The fourth proportional to 929.02, 1,394.40 and 621.10 is: 932.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.02 : 1,394.40 = 621.10 : x
  2. Step 2: Convert to fraction form
    929.02/1,394.40 = 621.10/x
  3. Step 3: Cross multiply
    929.02x = 1,394.40 × 621.10
  4. Step 4: Simplify right side
    929.02x = 866,061.84
  5. Step 5: Solve for x
    x = 866,061.84/929.02
  6. Step 6: Final answer
    x = 932.23

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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.