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Finding the Fourth Proportional to 319,077.80, 478,386.30 and 178,879.40

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Solution

The fourth proportional to 319,077.80, 478,386.30 and 178,879.40 is: 268,189.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,077.80 : 478,386.30 = 178,879.40 : x
  2. Step 2: Convert to fraction form
    319,077.80/478,386.30 = 178,879.40/x
  3. Step 3: Cross multiply
    319,077.80x = 478,386.30 × 178,879.40
  4. Step 4: Simplify right side
    319,077.80x = 85,573,454,312.22
  5. Step 5: Solve for x
    x = 85,573,454,312.22/319,077.80
  6. Step 6: Final answer
    x = 268,189.93

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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.