Home / 486,021.80-729,032.70-309,312.20

Finding the Fourth Proportional to 486,021.80, 729,032.70 and 309,312.20

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Solution

The fourth proportional to 486,021.80, 729,032.70 and 309,312.20 is: 463,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,021.80 : 729,032.70 = 309,312.20 : x
  2. Step 2: Convert to fraction form
    486,021.80/729,032.70 = 309,312.20/x
  3. Step 3: Cross multiply
    486,021.80x = 729,032.70 × 309,312.20
  4. Step 4: Simplify right side
    486,021.80x = 225,498,708,308.94
  5. Step 5: Solve for x
    x = 225,498,708,308.94/486,021.80
  6. Step 6: Final answer
    x = 463,968.30

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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.