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Finding the Fourth Proportional to 907.15, 1,357.53 and 628.16

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Solution

The fourth proportional to 907.15, 1,357.53 and 628.16 is: 940.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.15 : 1,357.53 = 628.16 : x
  2. Step 2: Convert to fraction form
    907.15/1,357.53 = 628.16/x
  3. Step 3: Cross multiply
    907.15x = 1,357.53 × 628.16
  4. Step 4: Simplify right side
    907.15x = 852,742.20
  5. Step 5: Solve for x
    x = 852,742.20/907.15
  6. Step 6: Final answer
    x = 940.02

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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.