Home / 992,038.40-1,488,403.20-431,475.20

Finding the Fourth Proportional to 992,038.40, 1,488,403.20 and 431,475.20

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Solution

The fourth proportional to 992,038.40, 1,488,403.20 and 431,475.20 is: 647,363.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    992,038.40 : 1,488,403.20 = 431,475.20 : x
  2. Step 2: Convert to fraction form
    992,038.40/1,488,403.20 = 431,475.20/x
  3. Step 3: Cross multiply
    992,038.40x = 1,488,403.20 × 431,475.20
  4. Step 4: Simplify right side
    992,038.40x = 642,209,068,400.64
  5. Step 5: Solve for x
    x = 642,209,068,400.64/992,038.40
  6. Step 6: Final answer
    x = 647,363.11

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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.