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Finding the Fourth Proportional to 563,665.80, 777,858.80 and 309,018.76

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Solution

The fourth proportional to 563,665.80, 777,858.80 and 309,018.76 is: 426,445.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,665.80 : 777,858.80 = 309,018.76 : x
  2. Step 2: Convert to fraction form
    563,665.80/777,858.80 = 309,018.76/x
  3. Step 3: Cross multiply
    563,665.80x = 777,858.80 × 309,018.76
  4. Step 4: Simplify right side
    563,665.80x = 240,372,961,831.09
  5. Step 5: Solve for x
    x = 240,372,961,831.09/563,665.80
  6. Step 6: Final answer
    x = 426,445.89

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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.