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Finding the Fourth Proportional to 1,570.90, 2,168.06 and 907.62

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Solution

The fourth proportional to 1,570.90, 2,168.06 and 907.62 is: 1,252.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.90 : 2,168.06 = 907.62 : x
  2. Step 2: Convert to fraction form
    1,570.90/2,168.06 = 907.62/x
  3. Step 3: Cross multiply
    1,570.90x = 2,168.06 × 907.62
  4. Step 4: Simplify right side
    1,570.90x = 1,967,774.62
  5. Step 5: Solve for x
    x = 1,967,774.62/1,570.90
  6. Step 6: Final answer
    x = 1,252.64

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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.