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Finding the Fourth Proportional to 509.95, 703.58 and 352.40

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Solution

The fourth proportional to 509.95, 703.58 and 352.40 is: 486.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.95 : 703.58 = 352.40 : x
  2. Step 2: Convert to fraction form
    509.95/703.58 = 352.40/x
  3. Step 3: Cross multiply
    509.95x = 703.58 × 352.40
  4. Step 4: Simplify right side
    509.95x = 247,938.94
  5. Step 5: Solve for x
    x = 247,938.94/509.95
  6. Step 6: Final answer
    x = 486.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.