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Finding the Fourth Proportional to 644,300.80, 966,742.80 and 307,211.20

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Solution

The fourth proportional to 644,300.80, 966,742.80 and 307,211.20 is: 460,955.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,300.80 : 966,742.80 = 307,211.20 : x
  2. Step 2: Convert to fraction form
    644,300.80/966,742.80 = 307,211.20/x
  3. Step 3: Cross multiply
    644,300.80x = 966,742.80 × 307,211.20
  4. Step 4: Simplify right side
    644,300.80x = 296,994,215,679.36
  5. Step 5: Solve for x
    x = 296,994,215,679.36/644,300.80
  6. Step 6: Final answer
    x = 460,955.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.