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Finding the Fourth Proportional to 865,820.80, 1,296,106.80 and 654,119.20

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Solution

The fourth proportional to 865,820.80, 1,296,106.80 and 654,119.20 is: 979,196.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,820.80 : 1,296,106.80 = 654,119.20 : x
  2. Step 2: Convert to fraction form
    865,820.80/1,296,106.80 = 654,119.20/x
  3. Step 3: Cross multiply
    865,820.80x = 1,296,106.80 × 654,119.20
  4. Step 4: Simplify right side
    865,820.80x = 847,808,343,130.56
  5. Step 5: Solve for x
    x = 847,808,343,130.56/865,820.80
  6. Step 6: Final answer
    x = 979,196.09

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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.