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Finding the Fourth Proportional to 525.32, 787.04 and 319.78

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Solution

The fourth proportional to 525.32, 787.04 and 319.78 is: 479.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.32 : 787.04 = 319.78 : x
  2. Step 2: Convert to fraction form
    525.32/787.04 = 319.78/x
  3. Step 3: Cross multiply
    525.32x = 787.04 × 319.78
  4. Step 4: Simplify right side
    525.32x = 251,683.51
  5. Step 5: Solve for x
    x = 251,683.51/525.32
  6. Step 6: Final answer
    x = 479.10

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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.