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Finding the Fourth Proportional to 569,340.75, 785,690.19 and 311,218.77

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Solution

The fourth proportional to 569,340.75, 785,690.19 and 311,218.77 is: 429,481.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    569,340.75 : 785,690.19 = 311,218.77 : x
  2. Step 2: Convert to fraction form
    569,340.75/785,690.19 = 311,218.77/x
  3. Step 3: Cross multiply
    569,340.75x = 785,690.19 × 311,218.77
  4. Step 4: Simplify right side
    569,340.75x = 244,521,534,532.87
  5. Step 5: Solve for x
    x = 244,521,534,532.87/569,340.75
  6. Step 6: Final answer
    x = 429,481.88

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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.