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Finding the Fourth Proportional to 255,148.80, 351,953.28 and 198,470.40

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Solution

The fourth proportional to 255,148.80, 351,953.28 and 198,470.40 is: 273,770.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,148.80 : 351,953.28 = 198,470.40 : x
  2. Step 2: Convert to fraction form
    255,148.80/351,953.28 = 198,470.40/x
  3. Step 3: Cross multiply
    255,148.80x = 351,953.28 × 198,470.40
  4. Step 4: Simplify right side
    255,148.80x = 69,852,308,262.91
  5. Step 5: Solve for x
    x = 69,852,308,262.91/255,148.80
  6. Step 6: Final answer
    x = 273,770.87

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1.5x scale

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.