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Finding the Fourth Proportional to 907.93, 1,252.56 and 612.70

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Solution

The fourth proportional to 907.93, 1,252.56 and 612.70 is: 845.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.93 : 1,252.56 = 612.70 : x
  2. Step 2: Convert to fraction form
    907.93/1,252.56 = 612.70/x
  3. Step 3: Cross multiply
    907.93x = 1,252.56 × 612.70
  4. Step 4: Simplify right side
    907.93x = 767,443.51
  5. Step 5: Solve for x
    x = 767,443.51/907.93
  6. Step 6: Final answer
    x = 845.27

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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.