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Finding the Fourth Proportional to 720,531.56, 994,352.30 and 398,246.74

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Solution

The fourth proportional to 720,531.56, 994,352.30 and 398,246.74 is: 549,590.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,531.56 : 994,352.30 = 398,246.74 : x
  2. Step 2: Convert to fraction form
    720,531.56/994,352.30 = 398,246.74/x
  3. Step 3: Cross multiply
    720,531.56x = 994,352.30 × 398,246.74
  4. Step 4: Simplify right side
    720,531.56x = 395,997,561,886.50
  5. Step 5: Solve for x
    x = 395,997,561,886.50/720,531.56
  6. Step 6: Final answer
    x = 549,590.86

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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.