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Finding the Fourth Proportional to 918,886.80, 1,375,219.80 and 806,912.40

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Solution

The fourth proportional to 918,886.80, 1,375,219.80 and 806,912.40 is: 1,207,637.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,886.80 : 1,375,219.80 = 806,912.40 : x
  2. Step 2: Convert to fraction form
    918,886.80/1,375,219.80 = 806,912.40/x
  3. Step 3: Cross multiply
    918,886.80x = 1,375,219.80 × 806,912.40
  4. Step 4: Simplify right side
    918,886.80x = 1,109,681,909,345.52
  5. Step 5: Solve for x
    x = 1,109,681,909,345.52/918,886.80
  6. Step 6: Final answer
    x = 1,207,637.23

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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.