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Finding the Fourth Proportional to 608,673.72, 839,969.10 and 340,401.72

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Solution

The fourth proportional to 608,673.72, 839,969.10 and 340,401.72 is: 469,754.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,673.72 : 839,969.10 = 340,401.72 : x
  2. Step 2: Convert to fraction form
    608,673.72/839,969.10 = 340,401.72/x
  3. Step 3: Cross multiply
    608,673.72x = 839,969.10 × 340,401.72
  4. Step 4: Simplify right side
    608,673.72x = 285,926,926,386.85
  5. Step 5: Solve for x
    x = 285,926,926,386.85/608,673.72
  6. Step 6: Final answer
    x = 469,754.02

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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.