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Finding the Fourth Proportional to 628,479.81, 867,321.66 and 356,559.16

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Solution

The fourth proportional to 628,479.81, 867,321.66 and 356,559.16 is: 492,062.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,479.81 : 867,321.66 = 356,559.16 : x
  2. Step 2: Convert to fraction form
    628,479.81/867,321.66 = 356,559.16/x
  3. Step 3: Cross multiply
    628,479.81x = 867,321.66 × 356,559.16
  4. Step 4: Simplify right side
    628,479.81x = 309,251,482,539.41
  5. Step 5: Solve for x
    x = 309,251,482,539.41/628,479.81
  6. Step 6: Final answer
    x = 492,062.72

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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.