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Finding the Fourth Proportional to 1,570.24, 2,353.40 and 645.29

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Solution

The fourth proportional to 1,570.24, 2,353.40 and 645.29 is: 967.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.24 : 2,353.40 = 645.29 : x
  2. Step 2: Convert to fraction form
    1,570.24/2,353.40 = 645.29/x
  3. Step 3: Cross multiply
    1,570.24x = 2,353.40 × 645.29
  4. Step 4: Simplify right side
    1,570.24x = 1,518,625.49
  5. Step 5: Solve for x
    x = 1,518,625.49/1,570.24
  6. Step 6: Final answer
    x = 967.13

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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.