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Finding the Fourth Proportional to 1,012.45, 1,518.80 and 457.07

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Solution

The fourth proportional to 1,012.45, 1,518.80 and 457.07 is: 685.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.45 : 1,518.80 = 457.07 : x
  2. Step 2: Convert to fraction form
    1,012.45/1,518.80 = 457.07/x
  3. Step 3: Cross multiply
    1,012.45x = 1,518.80 × 457.07
  4. Step 4: Simplify right side
    1,012.45x = 694,195.63
  5. Step 5: Solve for x
    x = 694,195.63/1,012.45
  6. Step 6: Final answer
    x = 685.66

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1.5x scale

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.