Home / 991,715.80-1,489,128.90-571,811.80

Finding the Fourth Proportional to 991,715.80, 1,489,128.90 and 571,811.80

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Solution

The fourth proportional to 991,715.80, 1,489,128.90 and 571,811.80 is: 858,614.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,715.80 : 1,489,128.90 = 571,811.80 : x
  2. Step 2: Convert to fraction form
    991,715.80/1,489,128.90 = 571,811.80/x
  3. Step 3: Cross multiply
    991,715.80x = 1,489,128.90 × 571,811.80
  4. Step 4: Simplify right side
    991,715.80x = 851,501,476,741.02
  5. Step 5: Solve for x
    x = 851,501,476,741.02/991,715.80
  6. Step 6: Final answer
    x = 858,614.41

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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.