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Finding the Fourth Proportional to 992,040.40, 1,488,406.20 and 431,477.20

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Solution

The fourth proportional to 992,040.40, 1,488,406.20 and 431,477.20 is: 647,366.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    992,040.40 : 1,488,406.20 = 431,477.20 : x
  2. Step 2: Convert to fraction form
    992,040.40/1,488,406.20 = 431,477.20/x
  3. Step 3: Cross multiply
    992,040.40x = 1,488,406.20 × 431,477.20
  4. Step 4: Simplify right side
    992,040.40x = 642,213,339,638.64
  5. Step 5: Solve for x
    x = 642,213,339,638.64/992,040.40
  6. Step 6: Final answer
    x = 647,366.11

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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.