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Finding the Fourth Proportional to 907.19, 1,360.95 and 291.05

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Solution

The fourth proportional to 907.19, 1,360.95 and 291.05 is: 436.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.19 : 1,360.95 = 291.05 : x
  2. Step 2: Convert to fraction form
    907.19/1,360.95 = 291.05/x
  3. Step 3: Cross multiply
    907.19x = 1,360.95 × 291.05
  4. Step 4: Simplify right side
    907.19x = 396,101.70
  5. Step 5: Solve for x
    x = 396,101.70/907.19
  6. Step 6: Final answer
    x = 436.63

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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.