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Finding the Fourth Proportional to 563,245.70, 777,249.34 and 321,518.66

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Solution

The fourth proportional to 563,245.70, 777,249.34 and 321,518.66 is: 443,678.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,245.70 : 777,249.34 = 321,518.66 : x
  2. Step 2: Convert to fraction form
    563,245.70/777,249.34 = 321,518.66/x
  3. Step 3: Cross multiply
    563,245.70x = 777,249.34 × 321,518.66
  4. Step 4: Simplify right side
    563,245.70x = 249,900,161,592.64
  5. Step 5: Solve for x
    x = 249,900,161,592.64/563,245.70
  6. Step 6: Final answer
    x = 443,678.78

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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.