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Finding the Fourth Proportional to 228,646.80, 315,532.20 and 128,044.80

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Solution

The fourth proportional to 228,646.80, 315,532.20 and 128,044.80 is: 176,701.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,646.80 : 315,532.20 = 128,044.80 : x
  2. Step 2: Convert to fraction form
    228,646.80/315,532.20 = 128,044.80/x
  3. Step 3: Cross multiply
    228,646.80x = 315,532.20 × 128,044.80
  4. Step 4: Simplify right side
    228,646.80x = 40,402,257,442.56
  5. Step 5: Solve for x
    x = 40,402,257,442.56/228,646.80
  6. Step 6: Final answer
    x = 176,701.61

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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.