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Finding the Fourth Proportional to 342,695.80, 514,043.70 and 319,367.80

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Solution

The fourth proportional to 342,695.80, 514,043.70 and 319,367.80 is: 479,051.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,695.80 : 514,043.70 = 319,367.80 : x
  2. Step 2: Convert to fraction form
    342,695.80/514,043.70 = 319,367.80/x
  3. Step 3: Cross multiply
    342,695.80x = 514,043.70 × 319,367.80
  4. Step 4: Simplify right side
    342,695.80x = 164,169,005,572.86
  5. Step 5: Solve for x
    x = 164,169,005,572.86/342,695.80
  6. Step 6: Final answer
    x = 479,051.70

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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.