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Finding the Fourth Proportional to 660,717.20, 991,075.80 and 394,996.70

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Solution

The fourth proportional to 660,717.20, 991,075.80 and 394,996.70 is: 592,495.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,717.20 : 991,075.80 = 394,996.70 : x
  2. Step 2: Convert to fraction form
    660,717.20/991,075.80 = 394,996.70/x
  3. Step 3: Cross multiply
    660,717.20x = 991,075.80 × 394,996.70
  4. Step 4: Simplify right side
    660,717.20x = 391,471,670,449.86
  5. Step 5: Solve for x
    x = 391,471,670,449.86/660,717.20
  6. Step 6: Final answer
    x = 592,495.05

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Similar ratio
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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.