Home / 991,728.80-1,489,148.40-571,824.80

Finding the Fourth Proportional to 991,728.80, 1,489,148.40 and 571,824.80

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Solution

The fourth proportional to 991,728.80, 1,489,148.40 and 571,824.80 is: 858,633.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,728.80 : 1,489,148.40 = 571,824.80 : x
  2. Step 2: Convert to fraction form
    991,728.80/1,489,148.40 = 571,824.80/x
  3. Step 3: Cross multiply
    991,728.80x = 1,489,148.40 × 571,824.80
  4. Step 4: Simplify right side
    991,728.80x = 851,531,986,000.32
  5. Step 5: Solve for x
    x = 851,531,986,000.32/991,728.80
  6. Step 6: Final answer
    x = 858,633.92

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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.