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Finding the Fourth Proportional to 986,866.80, 1,478,331.90 and 687,685.20

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Solution

The fourth proportional to 986,866.80, 1,478,331.90 and 687,685.20 is: 1,030,156.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,866.80 : 1,478,331.90 = 687,685.20 : x
  2. Step 2: Convert to fraction form
    986,866.80/1,478,331.90 = 687,685.20/x
  3. Step 3: Cross multiply
    986,866.80x = 1,478,331.90 × 687,685.20
  4. Step 4: Simplify right side
    986,866.80x = 1,016,626,968,317.88
  5. Step 5: Solve for x
    x = 1,016,626,968,317.88/986,866.80
  6. Step 6: Final answer
    x = 1,030,156.22

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.