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Finding the Fourth Proportional to 1,065.30, 1,595.22 and 653.19

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Solution

The fourth proportional to 1,065.30, 1,595.22 and 653.19 is: 978.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065.30 : 1,595.22 = 653.19 : x
  2. Step 2: Convert to fraction form
    1,065.30/1,595.22 = 653.19/x
  3. Step 3: Cross multiply
    1,065.30x = 1,595.22 × 653.19
  4. Step 4: Simplify right side
    1,065.30x = 1,041,981.75
  5. Step 5: Solve for x
    x = 1,041,981.75/1,065.30
  6. Step 6: Final answer
    x = 978.11

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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.