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Finding the Fourth Proportional to 610,439.80, 915,659.70 and 278,663.80

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Solution

The fourth proportional to 610,439.80, 915,659.70 and 278,663.80 is: 417,995.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,439.80 : 915,659.70 = 278,663.80 : x
  2. Step 2: Convert to fraction form
    610,439.80/915,659.70 = 278,663.80/x
  3. Step 3: Cross multiply
    610,439.80x = 915,659.70 × 278,663.80
  4. Step 4: Simplify right side
    610,439.80x = 255,161,211,508.86
  5. Step 5: Solve for x
    x = 255,161,211,508.86/610,439.80
  6. Step 6: Final answer
    x = 417,995.70

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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.