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Finding the Fourth Proportional to 865,614.65, 1,194,610.06 and 478,421.74

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Solution

The fourth proportional to 865,614.65, 1,194,610.06 and 478,421.74 is: 660,256.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,614.65 : 1,194,610.06 = 478,421.74 : x
  2. Step 2: Convert to fraction form
    865,614.65/1,194,610.06 = 478,421.74/x
  3. Step 3: Cross multiply
    865,614.65x = 1,194,610.06 × 478,421.74
  4. Step 4: Simplify right side
    865,614.65x = 571,527,422,926.87
  5. Step 5: Solve for x
    x = 571,527,422,926.87/865,614.65
  6. Step 6: Final answer
    x = 660,256.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.