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Finding the Fourth Proportional to 563,993.28, 778,317.12 and 309,372.48

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Solution

The fourth proportional to 563,993.28, 778,317.12 and 309,372.48 is: 426,937.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,993.28 : 778,317.12 = 309,372.48 : x
  2. Step 2: Convert to fraction form
    563,993.28/778,317.12 = 309,372.48/x
  3. Step 3: Cross multiply
    563,993.28x = 778,317.12 × 309,372.48
  4. Step 4: Simplify right side
    563,993.28x = 240,789,897,640.86
  5. Step 5: Solve for x
    x = 240,789,897,640.86/563,993.28
  6. Step 6: Final answer
    x = 426,937.53

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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.