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Finding the Fourth Proportional to 628,776, 867,709.44 and 342,298.08

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Solution

The fourth proportional to 628,776, 867,709.44 and 342,298.08 is: 472,370.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,776 : 867,709.44 = 342,298.08 : x
  2. Step 2: Convert to fraction form
    628,776/867,709.44 = 342,298.08/x
  3. Step 3: Cross multiply
    628,776x = 867,709.44 × 342,298.08
  4. Step 4: Simplify right side
    628,776x = 297,015,275,309.88
  5. Step 5: Solve for x
    x = 297,015,275,309.88/628,776
  6. Step 6: Final answer
    x = 472,370.57

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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.