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Finding the Fourth Proportional to 210,624.40, 315,936.60 and 209,312.20

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Solution

The fourth proportional to 210,624.40, 315,936.60 and 209,312.20 is: 313,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,624.40 : 315,936.60 = 209,312.20 : x
  2. Step 2: Convert to fraction form
    210,624.40/315,936.60 = 209,312.20/x
  3. Step 3: Cross multiply
    210,624.40x = 315,936.60 × 209,312.20
  4. Step 4: Simplify right side
    210,624.40x = 66,129,384,806.52
  5. Step 5: Solve for x
    x = 66,129,384,806.52/210,624.40
  6. Step 6: Final answer
    x = 313,968.30

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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.