Home / 992,041.40-1,488,407.70-431,478.20

Finding the Fourth Proportional to 992,041.40, 1,488,407.70 and 431,478.20

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Solution

The fourth proportional to 992,041.40, 1,488,407.70 and 431,478.20 is: 647,367.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    992,041.40 : 1,488,407.70 = 431,478.20 : x
  2. Step 2: Convert to fraction form
    992,041.40/1,488,407.70 = 431,478.20/x
  3. Step 3: Cross multiply
    992,041.40x = 1,488,407.70 × 431,478.20
  4. Step 4: Simplify right side
    992,041.40x = 642,215,475,262.14
  5. Step 5: Solve for x
    x = 642,215,475,262.14/992,041.40
  6. Step 6: Final answer
    x = 647,367.62

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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.