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Finding the Fourth Proportional to 487.06, 729.12 and 313.90

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Solution

The fourth proportional to 487.06, 729.12 and 313.90 is: 469.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.06 : 729.12 = 313.90 : x
  2. Step 2: Convert to fraction form
    487.06/729.12 = 313.90/x
  3. Step 3: Cross multiply
    487.06x = 729.12 × 313.90
  4. Step 4: Simplify right side
    487.06x = 228,870.77
  5. Step 5: Solve for x
    x = 228,870.77/487.06
  6. Step 6: Final answer
    x = 469.90

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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.