Home / 578,102.40-865,987.20-389,145.60

Finding the Fourth Proportional to 578,102.40, 865,987.20 and 389,145.60

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Solution

The fourth proportional to 578,102.40, 865,987.20 and 389,145.60 is: 582,933.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,102.40 : 865,987.20 = 389,145.60 : x
  2. Step 2: Convert to fraction form
    578,102.40/865,987.20 = 389,145.60/x
  3. Step 3: Cross multiply
    578,102.40x = 865,987.20 × 389,145.60
  4. Step 4: Simplify right side
    578,102.40x = 336,995,108,536.32
  5. Step 5: Solve for x
    x = 336,995,108,536.32/578,102.40
  6. Step 6: Final answer
    x = 582,933.25

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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.