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Finding the Fourth Proportional to 658,671.84, 989,330.40 and 392,951.52

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Solution

The fourth proportional to 658,671.84, 989,330.40 and 392,951.52 is: 590,216.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,671.84 : 989,330.40 = 392,951.52 : x
  2. Step 2: Convert to fraction form
    658,671.84/989,330.40 = 392,951.52/x
  3. Step 3: Cross multiply
    658,671.84x = 989,330.40 × 392,951.52
  4. Step 4: Simplify right side
    658,671.84x = 388,758,884,462.21
  5. Step 5: Solve for x
    x = 388,758,884,462.21/658,671.84
  6. Step 6: Final answer
    x = 590,216.34

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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.