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Finding the Fourth Proportional to 856.02, 1,283.34 and 807.72

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Solution

The fourth proportional to 856.02, 1,283.34 and 807.72 is: 1,210.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.02 : 1,283.34 = 807.72 : x
  2. Step 2: Convert to fraction form
    856.02/1,283.34 = 807.72/x
  3. Step 3: Cross multiply
    856.02x = 1,283.34 × 807.72
  4. Step 4: Simplify right side
    856.02x = 1,036,584.82
  5. Step 5: Solve for x
    x = 1,036,584.82/856.02
  6. Step 6: Final answer
    x = 1,210.94

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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.