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Finding the Fourth Proportional to 1,555.60, 2,332.86 and 459.67

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Solution

The fourth proportional to 1,555.60, 2,332.86 and 459.67 is: 689.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.60 : 2,332.86 = 459.67 : x
  2. Step 2: Convert to fraction form
    1,555.60/2,332.86 = 459.67/x
  3. Step 3: Cross multiply
    1,555.60x = 2,332.86 × 459.67
  4. Step 4: Simplify right side
    1,555.60x = 1,072,345.76
  5. Step 5: Solve for x
    x = 1,072,345.76/1,555.60
  6. Step 6: Final answer
    x = 689.35

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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.