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Finding the Fourth Proportional to 638,304.60, 957,392.10 and 217,574.40

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Solution

The fourth proportional to 638,304.60, 957,392.10 and 217,574.40 is: 326,339.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,304.60 : 957,392.10 = 217,574.40 : x
  2. Step 2: Convert to fraction form
    638,304.60/957,392.10 = 217,574.40/x
  3. Step 3: Cross multiply
    638,304.60x = 957,392.10 × 217,574.40
  4. Step 4: Simplify right side
    638,304.60x = 208,304,011,722.24
  5. Step 5: Solve for x
    x = 208,304,011,722.24/638,304.60
  6. Step 6: Final answer
    x = 326,339.51

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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.