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Finding the Fourth Proportional to 1,006.20, 1,509.18 and 313.32

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Solution

The fourth proportional to 1,006.20, 1,509.18 and 313.32 is: 469.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.20 : 1,509.18 = 313.32 : x
  2. Step 2: Convert to fraction form
    1,006.20/1,509.18 = 313.32/x
  3. Step 3: Cross multiply
    1,006.20x = 1,509.18 × 313.32
  4. Step 4: Simplify right side
    1,006.20x = 472,856.28
  5. Step 5: Solve for x
    x = 472,856.28/1,006.20
  6. Step 6: Final answer
    x = 469.94

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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.