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Finding the Fourth Proportional to 870.42, 1,201.12 and 477.37

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Solution

The fourth proportional to 870.42, 1,201.12 and 477.37 is: 658.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    870.42 : 1,201.12 = 477.37 : x
  2. Step 2: Convert to fraction form
    870.42/1,201.12 = 477.37/x
  3. Step 3: Cross multiply
    870.42x = 1,201.12 × 477.37
  4. Step 4: Simplify right side
    870.42x = 573,378.65
  5. Step 5: Solve for x
    x = 573,378.65/870.42
  6. Step 6: Final answer
    x = 658.74

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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.