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Finding the Fourth Proportional to 907.19, 1,252.22 and 645.96

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Solution

The fourth proportional to 907.19, 1,252.22 and 645.96 is: 891.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.19 : 1,252.22 = 645.96 : x
  2. Step 2: Convert to fraction form
    907.19/1,252.22 = 645.96/x
  3. Step 3: Cross multiply
    907.19x = 1,252.22 × 645.96
  4. Step 4: Simplify right side
    907.19x = 808,884.03
  5. Step 5: Solve for x
    x = 808,884.03/907.19
  6. Step 6: Final answer
    x = 891.64

Related Problems

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Half scale
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Double scale
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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.