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Finding the Fourth Proportional to 525.77, 787.03 and 309.77

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Solution

The fourth proportional to 525.77, 787.03 and 309.77 is: 463.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.77 : 787.03 = 309.77 : x
  2. Step 2: Convert to fraction form
    525.77/787.03 = 309.77/x
  3. Step 3: Cross multiply
    525.77x = 787.03 × 309.77
  4. Step 4: Simplify right side
    525.77x = 243,793.57
  5. Step 5: Solve for x
    x = 243,793.57/525.77
  6. Step 6: Final answer
    x = 463.69

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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.