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Finding the Fourth Proportional to 720,216.26, 993,918.48 and 397,947.12

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Solution

The fourth proportional to 720,216.26, 993,918.48 and 397,947.12 is: 549,178.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,216.26 : 993,918.48 = 397,947.12 : x
  2. Step 2: Convert to fraction form
    720,216.26/993,918.48 = 397,947.12/x
  3. Step 3: Cross multiply
    720,216.26x = 993,918.48 × 397,947.12
  4. Step 4: Simplify right side
    720,216.26x = 395,526,996,630.78
  5. Step 5: Solve for x
    x = 395,526,996,630.78/720,216.26
  6. Step 6: Final answer
    x = 549,178.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.