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Finding the Fourth Proportional to 228,646.71, 315,532.71 and 128,044.71

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Solution

The fourth proportional to 228,646.71, 315,532.71 and 128,044.71 is: 176,701.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,646.71 : 315,532.71 = 128,044.71 : x
  2. Step 2: Convert to fraction form
    228,646.71/315,532.71 = 128,044.71/x
  3. Step 3: Cross multiply
    228,646.71x = 315,532.71 × 128,044.71
  4. Step 4: Simplify right side
    228,646.71x = 40,402,294,347.46
  5. Step 5: Solve for x
    x = 40,402,294,347.46/228,646.71
  6. Step 6: Final answer
    x = 176,701.84

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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.