Home / 992,129.16-1,488,160.80-431,164.20

Finding the Fourth Proportional to 992,129.16, 1,488,160.80 and 431,164.20

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Solution

The fourth proportional to 992,129.16, 1,488,160.80 and 431,164.20 is: 646,731.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    992,129.16 : 1,488,160.80 = 431,164.20 : x
  2. Step 2: Convert to fraction form
    992,129.16/1,488,160.80 = 431,164.20/x
  3. Step 3: Cross multiply
    992,129.16x = 1,488,160.80 × 431,164.20
  4. Step 4: Simplify right side
    992,129.16x = 641,641,660,803.36
  5. Step 5: Solve for x
    x = 641,641,660,803.36/992,129.16
  6. Step 6: Final answer
    x = 646,731.98

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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.