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Finding the Fourth Proportional to 989,720.40, 1,483,268.40 and 876,871.20

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Solution

The fourth proportional to 989,720.40, 1,483,268.40 and 876,871.20 is: 1,314,144.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,720.40 : 1,483,268.40 = 876,871.20 : x
  2. Step 2: Convert to fraction form
    989,720.40/1,483,268.40 = 876,871.20/x
  3. Step 3: Cross multiply
    989,720.40x = 1,483,268.40 × 876,871.20
  4. Step 4: Simplify right side
    989,720.40x = 1,300,635,341,830.08
  5. Step 5: Solve for x
    x = 1,300,635,341,830.08/989,720.40
  6. Step 6: Final answer
    x = 1,314,144.22

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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.