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Finding the Fourth Proportional to 317,809.64, 476,597.61 and 128,219.31

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Solution

The fourth proportional to 317,809.64, 476,597.61 and 128,219.31 is: 192,281.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,809.64 : 476,597.61 = 128,219.31 : x
  2. Step 2: Convert to fraction form
    317,809.64/476,597.61 = 128,219.31/x
  3. Step 3: Cross multiply
    317,809.64x = 476,597.61 × 128,219.31
  4. Step 4: Simplify right side
    317,809.64x = 61,109,016,701.85
  5. Step 5: Solve for x
    x = 61,109,016,701.85/317,809.64
  6. Step 6: Final answer
    x = 192,281.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.