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Finding the Fourth Proportional to 522.15, 783.20 and 368.75

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Solution

The fourth proportional to 522.15, 783.20 and 368.75 is: 553.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.15 : 783.20 = 368.75 : x
  2. Step 2: Convert to fraction form
    522.15/783.20 = 368.75/x
  3. Step 3: Cross multiply
    522.15x = 783.20 × 368.75
  4. Step 4: Simplify right side
    522.15x = 288,807.88
  5. Step 5: Solve for x
    x = 288,807.88/522.15
  6. Step 6: Final answer
    x = 553.12

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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.