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Finding the Fourth Proportional to 210,015.40, 315,023.10 and 188,364.10

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Solution

The fourth proportional to 210,015.40, 315,023.10 and 188,364.10 is: 282,546.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,015.40 : 315,023.10 = 188,364.10 : x
  2. Step 2: Convert to fraction form
    210,015.40/315,023.10 = 188,364.10/x
  3. Step 3: Cross multiply
    210,015.40x = 315,023.10 × 188,364.10
  4. Step 4: Simplify right side
    210,015.40x = 59,339,042,710.71
  5. Step 5: Solve for x
    x = 59,339,042,710.71/210,015.40
  6. Step 6: Final answer
    x = 282,546.15

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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.