Home / 1,555.05-2,332.80-459.42

Finding the Fourth Proportional to 1,555.05, 2,332.80 and 459.42

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Solution

The fourth proportional to 1,555.05, 2,332.80 and 459.42 is: 689.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.05 : 2,332.80 = 459.42 : x
  2. Step 2: Convert to fraction form
    1,555.05/2,332.80 = 459.42/x
  3. Step 3: Cross multiply
    1,555.05x = 2,332.80 × 459.42
  4. Step 4: Simplify right side
    1,555.05x = 1,071,739.35
  5. Step 5: Solve for x
    x = 1,071,739.35/1,555.05
  6. Step 6: Final answer
    x = 689.20

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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.