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Finding the Fourth Proportional to 210,859.80, 316,289.70 and 191,506.20

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Solution

The fourth proportional to 210,859.80, 316,289.70 and 191,506.20 is: 287,259.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,859.80 : 316,289.70 = 191,506.20 : x
  2. Step 2: Convert to fraction form
    210,859.80/316,289.70 = 191,506.20/x
  3. Step 3: Cross multiply
    210,859.80x = 316,289.70 × 191,506.20
  4. Step 4: Simplify right side
    210,859.80x = 60,571,438,546.14
  5. Step 5: Solve for x
    x = 60,571,438,546.14/210,859.80
  6. Step 6: Final answer
    x = 287,259.30

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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.