Home / 1,391,659.16-1,920,510.18-810,869.72

Finding the Fourth Proportional to 1,391,659.16, 1,920,510.18 and 810,869.72

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Solution

The fourth proportional to 1,391,659.16, 1,920,510.18 and 810,869.72 is: 1,119,012.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,659.16 : 1,920,510.18 = 810,869.72 : x
  2. Step 2: Convert to fraction form
    1,391,659.16/1,920,510.18 = 810,869.72/x
  3. Step 3: Cross multiply
    1,391,659.16x = 1,920,510.18 × 810,869.72
  4. Step 4: Simplify right side
    1,391,659.16x = 1,557,283,551,913.75
  5. Step 5: Solve for x
    x = 1,557,283,551,913.75/1,391,659.16
  6. Step 6: Final answer
    x = 1,119,012.18

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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.