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Finding the Fourth Proportional to 720,484.58, 994,182.54 and 398,150.88

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Solution

The fourth proportional to 720,484.58, 994,182.54 and 398,150.88 is: 549,400.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,484.58 : 994,182.54 = 398,150.88 : x
  2. Step 2: Convert to fraction form
    720,484.58/994,182.54 = 398,150.88/x
  3. Step 3: Cross multiply
    720,484.58x = 994,182.54 × 398,150.88
  4. Step 4: Simplify right side
    720,484.58x = 395,834,653,181.64
  5. Step 5: Solve for x
    x = 395,834,653,181.64/720,484.58
  6. Step 6: Final answer
    x = 549,400.59

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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.