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Finding the Fourth Proportional to 628,713.72, 867,598.89 and 356,776.08

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Solution

The fourth proportional to 628,713.72, 867,598.89 and 356,776.08 is: 492,336.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,713.72 : 867,598.89 = 356,776.08 : x
  2. Step 2: Convert to fraction form
    628,713.72/867,598.89 = 356,776.08/x
  3. Step 3: Cross multiply
    628,713.72x = 867,598.89 × 356,776.08
  4. Step 4: Simplify right side
    628,713.72x = 309,538,530,986.55
  5. Step 5: Solve for x
    x = 309,538,530,986.55/628,713.72
  6. Step 6: Final answer
    x = 492,336.21

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1.5x scale

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.