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Finding the Fourth Proportional to 859.16, 1,291.05 and 469.46

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Solution

The fourth proportional to 859.16, 1,291.05 and 469.46 is: 705.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.16 : 1,291.05 = 469.46 : x
  2. Step 2: Convert to fraction form
    859.16/1,291.05 = 469.46/x
  3. Step 3: Cross multiply
    859.16x = 1,291.05 × 469.46
  4. Step 4: Simplify right side
    859.16x = 606,099.56
  5. Step 5: Solve for x
    x = 606,099.56/859.16
  6. Step 6: Final answer
    x = 705.45

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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.