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Finding the Fourth Proportional to 210,860.80, 316,291.20 and 191,507.20

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Solution

The fourth proportional to 210,860.80, 316,291.20 and 191,507.20 is: 287,260.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,860.80 : 316,291.20 = 191,507.20 : x
  2. Step 2: Convert to fraction form
    210,860.80/316,291.20 = 191,507.20/x
  3. Step 3: Cross multiply
    210,860.80x = 316,291.20 × 191,507.20
  4. Step 4: Simplify right side
    210,860.80x = 60,572,042,096.64
  5. Step 5: Solve for x
    x = 60,572,042,096.64/210,860.80
  6. Step 6: Final answer
    x = 287,260.80

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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.