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Finding the Fourth Proportional to 720,833.48, 994,730.40 and 398,557.16

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Solution

The fourth proportional to 720,833.48, 994,730.40 and 398,557.16 is: 549,997.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,833.48 : 994,730.40 = 398,557.16 : x
  2. Step 2: Convert to fraction form
    720,833.48/994,730.40 = 398,557.16/x
  3. Step 3: Cross multiply
    720,833.48x = 994,730.40 × 398,557.16
  4. Step 4: Simplify right side
    720,833.48x = 396,456,923,189.66
  5. Step 5: Solve for x
    x = 396,456,923,189.66/720,833.48
  6. Step 6: Final answer
    x = 549,997.93

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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.