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Finding the Fourth Proportional to 563,908.76, 778,195.13 and 309,261.77

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Solution

The fourth proportional to 563,908.76, 778,195.13 and 309,261.77 is: 426,781.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,908.76 : 778,195.13 = 309,261.77 : x
  2. Step 2: Convert to fraction form
    563,908.76/778,195.13 = 309,261.77/x
  3. Step 3: Cross multiply
    563,908.76x = 778,195.13 × 309,261.77
  4. Step 4: Simplify right side
    563,908.76x = 240,665,997,871.90
  5. Step 5: Solve for x
    x = 240,665,997,871.90/563,908.76
  6. Step 6: Final answer
    x = 426,781.81

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Double scale
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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.