Home / 1,187,620.67-1,640,278.55-781,535.40

Finding the Fourth Proportional to 1,187,620.67, 1,640,278.55 and 781,535.40

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Solution

The fourth proportional to 1,187,620.67, 1,640,278.55 and 781,535.40 is: 1,079,415.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,620.67 : 1,640,278.55 = 781,535.40 : x
  2. Step 2: Convert to fraction form
    1,187,620.67/1,640,278.55 = 781,535.40/x
  3. Step 3: Cross multiply
    1,187,620.67x = 1,640,278.55 × 781,535.40
  4. Step 4: Simplify right side
    1,187,620.67x = 1,281,935,748,777.99
  5. Step 5: Solve for x
    x = 1,281,935,748,777.99/1,187,620.67
  6. Step 6: Final answer
    x = 1,079,415.16

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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.