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Finding the Fourth Proportional to 508,680.55, 763,181.25 and 319,272.67

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Solution

The fourth proportional to 508,680.55, 763,181.25 and 319,272.67 is: 479,009.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,680.55 : 763,181.25 = 319,272.67 : x
  2. Step 2: Convert to fraction form
    508,680.55/763,181.25 = 319,272.67/x
  3. Step 3: Cross multiply
    508,680.55x = 763,181.25 × 319,272.67
  4. Step 4: Simplify right side
    508,680.55x = 243,662,915,381.44
  5. Step 5: Solve for x
    x = 243,662,915,381.44/508,680.55
  6. Step 6: Final answer
    x = 479,009.70

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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.