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Finding the Fourth Proportional to 371,490.30, 557,235.45 and 134,840.70

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Solution

The fourth proportional to 371,490.30, 557,235.45 and 134,840.70 is: 202,261.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,490.30 : 557,235.45 = 134,840.70 : x
  2. Step 2: Convert to fraction form
    371,490.30/557,235.45 = 134,840.70/x
  3. Step 3: Cross multiply
    371,490.30x = 557,235.45 × 134,840.70
  4. Step 4: Simplify right side
    371,490.30x = 75,138,018,142.82
  5. Step 5: Solve for x
    x = 75,138,018,142.82/371,490.30
  6. Step 6: Final answer
    x = 202,261.05

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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.