Home / 920,146.88-1,270,301.12-645,348.64

Finding the Fourth Proportional to 920,146.88, 1,270,301.12 and 645,348.64

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Solution

The fourth proportional to 920,146.88, 1,270,301.12 and 645,348.64 is: 890,930.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,146.88 : 1,270,301.12 = 645,348.64 : x
  2. Step 2: Convert to fraction form
    920,146.88/1,270,301.12 = 645,348.64/x
  3. Step 3: Cross multiply
    920,146.88x = 1,270,301.12 × 645,348.64
  4. Step 4: Simplify right side
    920,146.88x = 819,787,100,182.48
  5. Step 5: Solve for x
    x = 819,787,100,182.48/920,146.88
  6. Step 6: Final answer
    x = 890,930.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.