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Finding the Fourth Proportional to 720,523.60, 994,374.05 and 398,226.76

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Solution

The fourth proportional to 720,523.60, 994,374.05 and 398,226.76 is: 549,581.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,523.60 : 994,374.05 = 398,226.76 : x
  2. Step 2: Convert to fraction form
    720,523.60/994,374.05 = 398,226.76/x
  3. Step 3: Cross multiply
    720,523.60x = 994,374.05 × 398,226.76
  4. Step 4: Simplify right side
    720,523.60x = 395,986,356,159.58
  5. Step 5: Solve for x
    x = 395,986,356,159.58/720,523.60
  6. Step 6: Final answer
    x = 549,581.38

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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.