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Finding the Fourth Proportional to 1,677.12, 2,515.69 and 507.12

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Solution

The fourth proportional to 1,677.12, 2,515.69 and 507.12 is: 760.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,677.12 : 2,515.69 = 507.12 : x
  2. Step 2: Convert to fraction form
    1,677.12/2,515.69 = 507.12/x
  3. Step 3: Cross multiply
    1,677.12x = 2,515.69 × 507.12
  4. Step 4: Simplify right side
    1,677.12x = 1,275,756.71
  5. Step 5: Solve for x
    x = 1,275,756.71/1,677.12
  6. Step 6: Final answer
    x = 760.68

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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.