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Finding the Fourth Proportional to 628,549.80, 867,382.10 and 342,063.74

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Solution

The fourth proportional to 628,549.80, 867,382.10 and 342,063.74 is: 472,038.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,549.80 : 867,382.10 = 342,063.74 : x
  2. Step 2: Convert to fraction form
    628,549.80/867,382.10 = 342,063.74/x
  3. Step 3: Cross multiply
    628,549.80x = 867,382.10 × 342,063.74
  4. Step 4: Simplify right side
    628,549.80x = 296,699,965,135.05
  5. Step 5: Solve for x
    x = 296,699,965,135.05/628,549.80
  6. Step 6: Final answer
    x = 472,038.91

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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.