Home / 992,339.80-1,488,048.90-431,085.40

Finding the Fourth Proportional to 992,339.80, 1,488,048.90 and 431,085.40

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Solution

The fourth proportional to 992,339.80, 1,488,048.90 and 431,085.40 is: 646,427.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    992,339.80 : 1,488,048.90 = 431,085.40 : x
  2. Step 2: Convert to fraction form
    992,339.80/1,488,048.90 = 431,085.40/x
  3. Step 3: Cross multiply
    992,339.80x = 1,488,048.90 × 431,085.40
  4. Step 4: Simplify right side
    992,339.80x = 641,476,155,276.06
  5. Step 5: Solve for x
    x = 641,476,155,276.06/992,339.80
  6. Step 6: Final answer
    x = 646,427.92

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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.