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Finding the Fourth Proportional to 1,639.71, 2,458.82 and 528.93

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Solution

The fourth proportional to 1,639.71, 2,458.82 and 528.93 is: 793.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.71 : 2,458.82 = 528.93 : x
  2. Step 2: Convert to fraction form
    1,639.71/2,458.82 = 528.93/x
  3. Step 3: Cross multiply
    1,639.71x = 2,458.82 × 528.93
  4. Step 4: Simplify right side
    1,639.71x = 1,300,541.02
  5. Step 5: Solve for x
    x = 1,300,541.02/1,639.71
  6. Step 6: Final answer
    x = 793.15

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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.