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Finding the Fourth Proportional to 508,734.20, 702,061.43 and 279,312.64

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Solution

The fourth proportional to 508,734.20, 702,061.43 and 279,312.64 is: 385,455.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,734.20 : 702,061.43 = 279,312.64 : x
  2. Step 2: Convert to fraction form
    508,734.20/702,061.43 = 279,312.64/x
  3. Step 3: Cross multiply
    508,734.20x = 702,061.43 × 279,312.64
  4. Step 4: Simplify right side
    508,734.20x = 196,094,630,660.46
  5. Step 5: Solve for x
    x = 196,094,630,660.46/508,734.20
  6. Step 6: Final answer
    x = 385,455.96

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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.