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Finding the Fourth Proportional to 526.71, 787.91 and 439.23

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Solution

The fourth proportional to 526.71, 787.91 and 439.23 is: 657.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.71 : 787.91 = 439.23 : x
  2. Step 2: Convert to fraction form
    526.71/787.91 = 439.23/x
  3. Step 3: Cross multiply
    526.71x = 787.91 × 439.23
  4. Step 4: Simplify right side
    526.71x = 346,071.51
  5. Step 5: Solve for x
    x = 346,071.51/526.71
  6. Step 6: Final answer
    x = 657.04

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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.