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Finding the Fourth Proportional to 870.88, 1,305.07 and 626.26

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Solution

The fourth proportional to 870.88, 1,305.07 and 626.26 is: 938.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    870.88 : 1,305.07 = 626.26 : x
  2. Step 2: Convert to fraction form
    870.88/1,305.07 = 626.26/x
  3. Step 3: Cross multiply
    870.88x = 1,305.07 × 626.26
  4. Step 4: Simplify right side
    870.88x = 817,313.14
  5. Step 5: Solve for x
    x = 817,313.14/870.88
  6. Step 6: Final answer
    x = 938.49

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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.