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Finding the Fourth Proportional to 478,618.20, 717,878.70 and 163,070.55

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Solution

The fourth proportional to 478,618.20, 717,878.70 and 163,070.55 is: 244,589.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,618.20 : 717,878.70 = 163,070.55 : x
  2. Step 2: Convert to fraction form
    478,618.20/717,878.70 = 163,070.55/x
  3. Step 3: Cross multiply
    478,618.20x = 717,878.70 × 163,070.55
  4. Step 4: Simplify right side
    478,618.20x = 117,064,874,442.29
  5. Step 5: Solve for x
    x = 117,064,874,442.29/478,618.20
  6. Step 6: Final answer
    x = 244,589.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.