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Finding the Fourth Proportional to 1,314,752.40, 1,968,629.40 and 838,861.20

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Solution

The fourth proportional to 1,314,752.40, 1,968,629.40 and 838,861.20 is: 1,256,059.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,314,752.40 : 1,968,629.40 = 838,861.20 : x
  2. Step 2: Convert to fraction form
    1,314,752.40/1,968,629.40 = 838,861.20/x
  3. Step 3: Cross multiply
    1,314,752.40x = 1,968,629.40 × 838,861.20
  4. Step 4: Simplify right side
    1,314,752.40x = 1,651,406,820,839.28
  5. Step 5: Solve for x
    x = 1,651,406,820,839.28/1,314,752.40
  6. Step 6: Final answer
    x = 1,256,059.18

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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.