Home / 861,607.81-1,189,178.21-499,031.56

Finding the Fourth Proportional to 861,607.81, 1,189,178.21 and 499,031.56

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Solution

The fourth proportional to 861,607.81, 1,189,178.21 and 499,031.56 is: 688,755.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,607.81 : 1,189,178.21 = 499,031.56 : x
  2. Step 2: Convert to fraction form
    861,607.81/1,189,178.21 = 499,031.56/x
  3. Step 3: Cross multiply
    861,607.81x = 1,189,178.21 × 499,031.56
  4. Step 4: Simplify right side
    861,607.81x = 593,437,456,643.80
  5. Step 5: Solve for x
    x = 593,437,456,643.80/861,607.81
  6. Step 6: Final answer
    x = 688,755.89

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Double scale
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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.