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Finding the Fourth Proportional to 400,718.40, 601,077.60 and 266,655.30

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Solution

The fourth proportional to 400,718.40, 601,077.60 and 266,655.30 is: 399,982.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,718.40 : 601,077.60 = 266,655.30 : x
  2. Step 2: Convert to fraction form
    400,718.40/601,077.60 = 266,655.30/x
  3. Step 3: Cross multiply
    400,718.40x = 601,077.60 × 266,655.30
  4. Step 4: Simplify right side
    400,718.40x = 160,280,527,751.28
  5. Step 5: Solve for x
    x = 160,280,527,751.28/400,718.40
  6. Step 6: Final answer
    x = 399,982.95

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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.