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Finding the Fourth Proportional to 319,062.80, 478,363.80 and 178,864.40

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Solution

The fourth proportional to 319,062.80, 478,363.80 and 178,864.40 is: 268,167.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,062.80 : 478,363.80 = 178,864.40 : x
  2. Step 2: Convert to fraction form
    319,062.80/478,363.80 = 178,864.40/x
  3. Step 3: Cross multiply
    319,062.80x = 478,363.80 × 178,864.40
  4. Step 4: Simplify right side
    319,062.80x = 85,562,254,068.72
  5. Step 5: Solve for x
    x = 85,562,254,068.72/319,062.80
  6. Step 6: Final answer
    x = 268,167.44

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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.