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Finding the Fourth Proportional to 907.57, 1,252.40 and 509.22

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Solution

The fourth proportional to 907.57, 1,252.40 and 509.22 is: 702.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.57 : 1,252.40 = 509.22 : x
  2. Step 2: Convert to fraction form
    907.57/1,252.40 = 509.22/x
  3. Step 3: Cross multiply
    907.57x = 1,252.40 × 509.22
  4. Step 4: Simplify right side
    907.57x = 637,744.58
  5. Step 5: Solve for x
    x = 637,744.58/907.57
  6. Step 6: Final answer
    x = 702.69

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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.