Home / 578,862.40-867,127.20-389,905.60

Finding the Fourth Proportional to 578,862.40, 867,127.20 and 389,905.60

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Solution

The fourth proportional to 578,862.40, 867,127.20 and 389,905.60 is: 584,072.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,862.40 : 867,127.20 = 389,905.60 : x
  2. Step 2: Convert to fraction form
    578,862.40/867,127.20 = 389,905.60/x
  3. Step 3: Cross multiply
    578,862.40x = 867,127.20 × 389,905.60
  4. Step 4: Simplify right side
    578,862.40x = 338,097,751,192.32
  5. Step 5: Solve for x
    x = 338,097,751,192.32/578,862.40
  6. Step 6: Final answer
    x = 584,072.75

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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.