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Finding the Fourth Proportional to 317,560.81, 437,629.82 and 311,724.82

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Solution

The fourth proportional to 317,560.81, 437,629.82 and 311,724.82 is: 429,587.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,560.81 : 437,629.82 = 311,724.82 : x
  2. Step 2: Convert to fraction form
    317,560.81/437,629.82 = 311,724.82/x
  3. Step 3: Cross multiply
    317,560.81x = 437,629.82 × 311,724.82
  4. Step 4: Simplify right side
    317,560.81x = 136,420,074,677.98
  5. Step 5: Solve for x
    x = 136,420,074,677.98/317,560.81
  6. Step 6: Final answer
    x = 429,587.26

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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.