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Finding the Fourth Proportional to 1,478.99, 2,218.47 and 554.53

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Solution

The fourth proportional to 1,478.99, 2,218.47 and 554.53 is: 831.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.99 : 2,218.47 = 554.53 : x
  2. Step 2: Convert to fraction form
    1,478.99/2,218.47 = 554.53/x
  3. Step 3: Cross multiply
    1,478.99x = 2,218.47 × 554.53
  4. Step 4: Simplify right side
    1,478.99x = 1,230,207.82
  5. Step 5: Solve for x
    x = 1,230,207.82/1,478.99
  6. Step 6: Final answer
    x = 831.79

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Double scale
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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.