Home / 1,087,357.80-1,631,036.70-689,761.20

Finding the Fourth Proportional to 1,087,357.80, 1,631,036.70 and 689,761.20

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Solution

The fourth proportional to 1,087,357.80, 1,631,036.70 and 689,761.20 is: 1,034,641.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087,357.80 : 1,631,036.70 = 689,761.20 : x
  2. Step 2: Convert to fraction form
    1,087,357.80/1,631,036.70 = 689,761.20/x
  3. Step 3: Cross multiply
    1,087,357.80x = 1,631,036.70 × 689,761.20
  4. Step 4: Simplify right side
    1,087,357.80x = 1,125,025,831,436.04
  5. Step 5: Solve for x
    x = 1,125,025,831,436.04/1,087,357.80
  6. Step 6: Final answer
    x = 1,034,641.80

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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.