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Finding the Fourth Proportional to 356,877.30, 534,331.80 and 278,145.30

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Solution

The fourth proportional to 356,877.30, 534,331.80 and 278,145.30 is: 416,450.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,877.30 : 534,331.80 = 278,145.30 : x
  2. Step 2: Convert to fraction form
    356,877.30/534,331.80 = 278,145.30/x
  3. Step 3: Cross multiply
    356,877.30x = 534,331.80 × 278,145.30
  4. Step 4: Simplify right side
    356,877.30x = 148,621,878,810.54
  5. Step 5: Solve for x
    x = 148,621,878,810.54/356,877.30
  6. Step 6: Final answer
    x = 416,450.92

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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.