Home / 1,388,761.40-2,079,642.90-912,870.20

Finding the Fourth Proportional to 1,388,761.40, 2,079,642.90 and 912,870.20

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Solution

The fourth proportional to 1,388,761.40, 2,079,642.90 and 912,870.20 is: 1,367,005.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,761.40 : 2,079,642.90 = 912,870.20 : x
  2. Step 2: Convert to fraction form
    1,388,761.40/2,079,642.90 = 912,870.20/x
  3. Step 3: Cross multiply
    1,388,761.40x = 2,079,642.90 × 912,870.20
  4. Step 4: Simplify right side
    1,388,761.40x = 1,898,444,030,051.58
  5. Step 5: Solve for x
    x = 1,898,444,030,051.58/1,388,761.40
  6. Step 6: Final answer
    x = 1,367,005.18

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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.