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Finding the Fourth Proportional to 2,356.08, 3,534.12 and 816.72

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Solution

The fourth proportional to 2,356.08, 3,534.12 and 816.72 is: 1,225.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,356.08 : 3,534.12 = 816.72 : x
  2. Step 2: Convert to fraction form
    2,356.08/3,534.12 = 816.72/x
  3. Step 3: Cross multiply
    2,356.08x = 3,534.12 × 816.72
  4. Step 4: Simplify right side
    2,356.08x = 2,886,386.49
  5. Step 5: Solve for x
    x = 2,886,386.49/2,356.08
  6. Step 6: Final answer
    x = 1,225.08

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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.