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Finding the Fourth Proportional to 720,519.60, 994,368.53 and 398,222.76

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Solution

The fourth proportional to 720,519.60, 994,368.53 and 398,222.76 is: 549,575.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,519.60 : 994,368.53 = 398,222.76 : x
  2. Step 2: Convert to fraction form
    720,519.60/994,368.53 = 398,222.76/x
  3. Step 3: Cross multiply
    720,519.60x = 994,368.53 × 398,222.76
  4. Step 4: Simplify right side
    720,519.60x = 395,980,180,473.74
  5. Step 5: Solve for x
    x = 395,980,180,473.74/720,519.60
  6. Step 6: Final answer
    x = 549,575.86

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Double scale
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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.