Home / 1,391,330.40-2,087,295.36-431,767.20

Finding the Fourth Proportional to 1,391,330.40, 2,087,295.36 and 431,767.20

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Solution

The fourth proportional to 1,391,330.40, 2,087,295.36 and 431,767.20 is: 647,743.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,330.40 : 2,087,295.36 = 431,767.20 : x
  2. Step 2: Convert to fraction form
    1,391,330.40/2,087,295.36 = 431,767.20/x
  3. Step 3: Cross multiply
    1,391,330.40x = 2,087,295.36 × 431,767.20
  4. Step 4: Simplify right side
    1,391,330.40x = 901,225,673,160.19
  5. Step 5: Solve for x
    x = 901,225,673,160.19/1,391,330.40
  6. Step 6: Final answer
    x = 647,743.82

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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.