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Finding the Fourth Proportional to 870,165.78, 1,200,810.66 and 482,958.48

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Solution

The fourth proportional to 870,165.78, 1,200,810.66 and 482,958.48 is: 666,472.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,165.78 : 1,200,810.66 = 482,958.48 : x
  2. Step 2: Convert to fraction form
    870,165.78/1,200,810.66 = 482,958.48/x
  3. Step 3: Cross multiply
    870,165.78x = 1,200,810.66 × 482,958.48
  4. Step 4: Simplify right side
    870,165.78x = 579,941,691,121.40
  5. Step 5: Solve for x
    x = 579,941,691,121.40/870,165.78
  6. Step 6: Final answer
    x = 666,472.65

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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.