Home / 1,555.12-2,332.95-459.55

Finding the Fourth Proportional to 1,555.12, 2,332.95 and 459.55

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Solution

The fourth proportional to 1,555.12, 2,332.95 and 459.55 is: 689.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.12 : 2,332.95 = 459.55 : x
  2. Step 2: Convert to fraction form
    1,555.12/2,332.95 = 459.55/x
  3. Step 3: Cross multiply
    1,555.12x = 2,332.95 × 459.55
  4. Step 4: Simplify right side
    1,555.12x = 1,072,107.17
  5. Step 5: Solve for x
    x = 1,072,107.17/1,555.12
  6. Step 6: Final answer
    x = 689.40

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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.