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Finding the Fourth Proportional to 317,561.31, 437,630.51 and 311,725.32

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Solution

The fourth proportional to 317,561.31, 437,630.51 and 311,725.32 is: 429,587.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,561.31 : 437,630.51 = 311,725.32 : x
  2. Step 2: Convert to fraction form
    317,561.31/437,630.51 = 311,725.32/x
  3. Step 3: Cross multiply
    317,561.31x = 437,630.51 × 311,725.32
  4. Step 4: Simplify right side
    317,561.31x = 136,420,508,583.36
  5. Step 5: Solve for x
    x = 136,420,508,583.36/317,561.31
  6. Step 6: Final answer
    x = 429,587.95

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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.