Home / 771,390.16-1,157,051.40-210,422.80

Finding the Fourth Proportional to 771,390.16, 1,157,051.40 and 210,422.80

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Solution

The fourth proportional to 771,390.16, 1,157,051.40 and 210,422.80 is: 315,624.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    771,390.16 : 1,157,051.40 = 210,422.80 : x
  2. Step 2: Convert to fraction form
    771,390.16/1,157,051.40 = 210,422.80/x
  3. Step 3: Cross multiply
    771,390.16x = 1,157,051.40 × 210,422.80
  4. Step 4: Simplify right side
    771,390.16x = 243,469,995,331.92
  5. Step 5: Solve for x
    x = 243,469,995,331.92/771,390.16
  6. Step 6: Final answer
    x = 315,624.97

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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.