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Finding the Fourth Proportional to 720,438.48, 994,200.48 and 398,167.20

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Solution

The fourth proportional to 720,438.48, 994,200.48 and 398,167.20 is: 549,468.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,438.48 : 994,200.48 = 398,167.20 : x
  2. Step 2: Convert to fraction form
    720,438.48/994,200.48 = 398,167.20/x
  3. Step 3: Cross multiply
    720,438.48x = 994,200.48 × 398,167.20
  4. Step 4: Simplify right side
    720,438.48x = 395,858,021,360.26
  5. Step 5: Solve for x
    x = 395,858,021,360.26/720,438.48
  6. Step 6: Final answer
    x = 549,468.18

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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.