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Finding the Fourth Proportional to 313,266.80, 469,900.20 and 76,606.40

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Solution

The fourth proportional to 313,266.80, 469,900.20 and 76,606.40 is: 114,909.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,266.80 : 469,900.20 = 76,606.40 : x
  2. Step 2: Convert to fraction form
    313,266.80/469,900.20 = 76,606.40/x
  3. Step 3: Cross multiply
    313,266.80x = 469,900.20 × 76,606.40
  4. Step 4: Simplify right side
    313,266.80x = 35,997,362,681.28
  5. Step 5: Solve for x
    x = 35,997,362,681.28/313,266.80
  6. Step 6: Final answer
    x = 114,909.60

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1.5x scale

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.