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Finding the Fourth Proportional to 720,856.72, 994,739.70 and 398,541.52

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Solution

The fourth proportional to 720,856.72, 994,739.70 and 398,541.52 is: 549,963.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,856.72 : 994,739.70 = 398,541.52 : x
  2. Step 2: Convert to fraction form
    720,856.72/994,739.70 = 398,541.52/x
  3. Step 3: Cross multiply
    720,856.72x = 994,739.70 × 398,541.52
  4. Step 4: Simplify right side
    720,856.72x = 396,445,072,042.34
  5. Step 5: Solve for x
    x = 396,445,072,042.34/720,856.72
  6. Step 6: Final answer
    x = 549,963.76

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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.