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Finding the Fourth Proportional to 907.48, 1,361.22 and 875.08

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Solution

The fourth proportional to 907.48, 1,361.22 and 875.08 is: 1,312.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.48 : 1,361.22 = 875.08 : x
  2. Step 2: Convert to fraction form
    907.48/1,361.22 = 875.08/x
  3. Step 3: Cross multiply
    907.48x = 1,361.22 × 875.08
  4. Step 4: Simplify right side
    907.48x = 1,191,176.40
  5. Step 5: Solve for x
    x = 1,191,176.40/907.48
  6. Step 6: Final answer
    x = 1,312.62

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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.