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Finding the Fourth Proportional to 563,667.80, 777,861.56 and 309,020.76

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Solution

The fourth proportional to 563,667.80, 777,861.56 and 309,020.76 is: 426,448.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,667.80 : 777,861.56 = 309,020.76 : x
  2. Step 2: Convert to fraction form
    563,667.80/777,861.56 = 309,020.76/x
  3. Step 3: Cross multiply
    563,667.80x = 777,861.56 × 309,020.76
  4. Step 4: Simplify right side
    563,667.80x = 240,375,370,445.99
  5. Step 5: Solve for x
    x = 240,375,370,445.99/563,667.80
  6. Step 6: Final answer
    x = 426,448.65

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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.