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Finding the Fourth Proportional to 695.61, 1,043.55 and 435.87

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Solution

The fourth proportional to 695.61, 1,043.55 and 435.87 is: 653.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.61 : 1,043.55 = 435.87 : x
  2. Step 2: Convert to fraction form
    695.61/1,043.55 = 435.87/x
  3. Step 3: Cross multiply
    695.61x = 1,043.55 × 435.87
  4. Step 4: Simplify right side
    695.61x = 454,852.14
  5. Step 5: Solve for x
    x = 454,852.14/695.61
  6. Step 6: Final answer
    x = 653.89

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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.