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Finding the Fourth Proportional to 720,624.45, 994,444.23 and 398,326.26

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Solution

The fourth proportional to 720,624.45, 994,444.23 and 398,326.26 is: 549,680.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,624.45 : 994,444.23 = 398,326.26 : x
  2. Step 2: Convert to fraction form
    720,624.45/994,444.23 = 398,326.26/x
  3. Step 3: Cross multiply
    720,624.45x = 994,444.23 × 398,326.26
  4. Step 4: Simplify right side
    720,624.45x = 396,113,250,914.48
  5. Step 5: Solve for x
    x = 396,113,250,914.48/720,624.45
  6. Step 6: Final answer
    x = 549,680.56

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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.