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Finding the Fourth Proportional to 720,752.88, 994,551.51 and 398,418.24

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Solution

The fourth proportional to 720,752.88, 994,551.51 and 398,418.24 is: 549,768.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,752.88 : 994,551.51 = 398,418.24 : x
  2. Step 2: Convert to fraction form
    720,752.88/994,551.51 = 398,418.24/x
  3. Step 3: Cross multiply
    720,752.88x = 994,551.51 × 398,418.24
  4. Step 4: Simplify right side
    720,752.88x = 396,247,467,427.18
  5. Step 5: Solve for x
    x = 396,247,467,427.18/720,752.88
  6. Step 6: Final answer
    x = 549,768.83

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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.