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Finding the Fourth Proportional to 638,278.40, 957,187.20 and 322,630.40

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Solution

The fourth proportional to 638,278.40, 957,187.20 and 322,630.40 is: 483,829.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,278.40 : 957,187.20 = 322,630.40 : x
  2. Step 2: Convert to fraction form
    638,278.40/957,187.20 = 322,630.40/x
  3. Step 3: Cross multiply
    638,278.40x = 957,187.20 × 322,630.40
  4. Step 4: Simplify right side
    638,278.40x = 308,817,689,210.88
  5. Step 5: Solve for x
    x = 308,817,689,210.88/638,278.40
  6. Step 6: Final answer
    x = 483,829.14

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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.