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Finding the Fourth Proportional to 907.50, 1,253.36 and 612.25

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Solution

The fourth proportional to 907.50, 1,253.36 and 612.25 is: 845.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.50 : 1,253.36 = 612.25 : x
  2. Step 2: Convert to fraction form
    907.50/1,253.36 = 612.25/x
  3. Step 3: Cross multiply
    907.50x = 1,253.36 × 612.25
  4. Step 4: Simplify right side
    907.50x = 767,369.66
  5. Step 5: Solve for x
    x = 767,369.66/907.50
  6. Step 6: Final answer
    x = 845.59

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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.