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Finding the Fourth Proportional to 563,661.78, 777,853.26 and 309,014.76

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Solution

The fourth proportional to 563,661.78, 777,853.26 and 309,014.76 is: 426,440.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,661.78 : 777,853.26 = 309,014.76 : x
  2. Step 2: Convert to fraction form
    563,661.78/777,853.26 = 309,014.76/x
  3. Step 3: Cross multiply
    563,661.78x = 777,853.26 × 309,014.76
  4. Step 4: Simplify right side
    563,661.78x = 240,368,138,454.12
  5. Step 5: Solve for x
    x = 240,368,138,454.12/563,661.78
  6. Step 6: Final answer
    x = 426,440.37

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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.