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Finding the Fourth Proportional to 553,276.80, 829,915.20 and 198,691.20

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Solution

The fourth proportional to 553,276.80, 829,915.20 and 198,691.20 is: 298,036.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,276.80 : 829,915.20 = 198,691.20 : x
  2. Step 2: Convert to fraction form
    553,276.80/829,915.20 = 198,691.20/x
  3. Step 3: Cross multiply
    553,276.80x = 829,915.20 × 198,691.20
  4. Step 4: Simplify right side
    553,276.80x = 164,896,846,986.24
  5. Step 5: Solve for x
    x = 164,896,846,986.24/553,276.80
  6. Step 6: Final answer
    x = 298,036.80

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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.