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Finding the Fourth Proportional to 660,715.80, 991,073.70 and 650,218.20

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Solution

The fourth proportional to 660,715.80, 991,073.70 and 650,218.20 is: 975,327.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,715.80 : 991,073.70 = 650,218.20 : x
  2. Step 2: Convert to fraction form
    660,715.80/991,073.70 = 650,218.20/x
  3. Step 3: Cross multiply
    660,715.80x = 991,073.70 × 650,218.20
  4. Step 4: Simplify right side
    660,715.80x = 644,414,157,281.34
  5. Step 5: Solve for x
    x = 644,414,157,281.34/660,715.80
  6. Step 6: Final answer
    x = 975,327.30

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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.