Home / 1,527.40-2,291.48-431.76

Finding the Fourth Proportional to 1,527.40, 2,291.48 and 431.76

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Solution

The fourth proportional to 1,527.40, 2,291.48 and 431.76 is: 647.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,527.40 : 2,291.48 = 431.76 : x
  2. Step 2: Convert to fraction form
    1,527.40/2,291.48 = 431.76/x
  3. Step 3: Cross multiply
    1,527.40x = 2,291.48 × 431.76
  4. Step 4: Simplify right side
    1,527.40x = 989,369.40
  5. Step 5: Solve for x
    x = 989,369.40/1,527.40
  6. Step 6: Final answer
    x = 647.75

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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.