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Finding the Fourth Proportional to 566,078.28, 781,186.86 and 311,428.86

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Solution

The fourth proportional to 566,078.28, 781,186.86 and 311,428.86 is: 429,771.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    566,078.28 : 781,186.86 = 311,428.86 : x
  2. Step 2: Convert to fraction form
    566,078.28/781,186.86 = 311,428.86/x
  3. Step 3: Cross multiply
    566,078.28x = 781,186.86 × 311,428.86
  4. Step 4: Simplify right side
    566,078.28x = 243,284,133,256.78
  5. Step 5: Solve for x
    x = 243,284,133,256.78/566,078.28
  6. Step 6: Final answer
    x = 429,771.19

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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.