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Finding the Fourth Proportional to 357,979.20, 538,135.20 and 253,521.60

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Solution

The fourth proportional to 357,979.20, 538,135.20 and 253,521.60 is: 381,108.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,979.20 : 538,135.20 = 253,521.60 : x
  2. Step 2: Convert to fraction form
    357,979.20/538,135.20 = 253,521.60/x
  3. Step 3: Cross multiply
    357,979.20x = 538,135.20 × 253,521.60
  4. Step 4: Simplify right side
    357,979.20x = 136,428,896,920.32
  5. Step 5: Solve for x
    x = 136,428,896,920.32/357,979.20
  6. Step 6: Final answer
    x = 381,108.45

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1.5x scale

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.