Home / 1,178,891.72-1,626,870.59-642,347.72

Finding the Fourth Proportional to 1,178,891.72, 1,626,870.59 and 642,347.72

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Solution

The fourth proportional to 1,178,891.72, 1,626,870.59 and 642,347.72 is: 886,439.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178,891.72 : 1,626,870.59 = 642,347.72 : x
  2. Step 2: Convert to fraction form
    1,178,891.72/1,626,870.59 = 642,347.72/x
  3. Step 3: Cross multiply
    1,178,891.72x = 1,626,870.59 × 642,347.72
  4. Step 4: Simplify right side
    1,178,891.72x = 1,045,016,611,385.03
  5. Step 5: Solve for x
    x = 1,045,016,611,385.03/1,178,891.72
  6. Step 6: Final answer
    x = 886,439.86

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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.