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Finding the Fourth Proportional to 566,135.90, 781,279.44 and 311,487.56

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Solution

The fourth proportional to 566,135.90, 781,279.44 and 311,487.56 is: 429,859.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    566,135.90 : 781,279.44 = 311,487.56 : x
  2. Step 2: Convert to fraction form
    566,135.90/781,279.44 = 311,487.56/x
  3. Step 3: Cross multiply
    566,135.90x = 781,279.44 × 311,487.56
  4. Step 4: Simplify right side
    566,135.90x = 243,358,826,443.77
  5. Step 5: Solve for x
    x = 243,358,826,443.77/566,135.90
  6. Step 6: Final answer
    x = 429,859.38

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Double scale
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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.