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Finding the Fourth Proportional to 478,478.55, 717,693.95 and 178,937.12

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Solution

The fourth proportional to 478,478.55, 717,693.95 and 178,937.12 is: 268,396.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,478.55 : 717,693.95 = 178,937.12 : x
  2. Step 2: Convert to fraction form
    478,478.55/717,693.95 = 178,937.12/x
  3. Step 3: Cross multiply
    478,478.55x = 717,693.95 × 178,937.12
  4. Step 4: Simplify right side
    478,478.55x = 128,422,083,971.27
  5. Step 5: Solve for x
    x = 128,422,083,971.27/478,478.55
  6. Step 6: Final answer
    x = 268,396.74

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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.