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Finding the Fourth Proportional to 611,145.48, 915,780.54 and 255,965.16

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Solution

The fourth proportional to 611,145.48, 915,780.54 and 255,965.16 is: 383,555.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,145.48 : 915,780.54 = 255,965.16 : x
  2. Step 2: Convert to fraction form
    611,145.48/915,780.54 = 255,965.16/x
  3. Step 3: Cross multiply
    611,145.48x = 915,780.54 × 255,965.16
  4. Step 4: Simplify right side
    611,145.48x = 234,407,912,445.99
  5. Step 5: Solve for x
    x = 234,407,912,445.99/611,145.48
  6. Step 6: Final answer
    x = 383,555.01

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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.