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Finding the Fourth Proportional to 640.02, 951.80 and 619.52

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Solution

The fourth proportional to 640.02, 951.80 and 619.52 is: 921.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.02 : 951.80 = 619.52 : x
  2. Step 2: Convert to fraction form
    640.02/951.80 = 619.52/x
  3. Step 3: Cross multiply
    640.02x = 951.80 × 619.52
  4. Step 4: Simplify right side
    640.02x = 589,654.76
  5. Step 5: Solve for x
    x = 589,654.76/640.02
  6. Step 6: Final answer
    x = 921.31

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