Home / 1,087.30-1,628.55-437.70

Finding the Fourth Proportional to 1,087.30, 1,628.55 and 437.70

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Solution

The fourth proportional to 1,087.30, 1,628.55 and 437.70 is: 655.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.30 : 1,628.55 = 437.70 : x
  2. Step 2: Convert to fraction form
    1,087.30/1,628.55 = 437.70/x
  3. Step 3: Cross multiply
    1,087.30x = 1,628.55 × 437.70
  4. Step 4: Simplify right side
    1,087.30x = 712,816.34
  5. Step 5: Solve for x
    x = 712,816.34/1,087.30
  6. Step 6: Final answer
    x = 655.58

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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.