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Finding the Fourth Proportional to 907.03, 1,248.78 and 867.07

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Solution

The fourth proportional to 907.03, 1,248.78 and 867.07 is: 1,193.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.03 : 1,248.78 = 867.07 : x
  2. Step 2: Convert to fraction form
    907.03/1,248.78 = 867.07/x
  3. Step 3: Cross multiply
    907.03x = 1,248.78 × 867.07
  4. Step 4: Simplify right side
    907.03x = 1,082,779.67
  5. Step 5: Solve for x
    x = 1,082,779.67/907.03
  6. Step 6: Final answer
    x = 1,193.76

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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.