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Finding the Fourth Proportional to 386,496.80, 579,745.20 and 260,525.60

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Solution

The fourth proportional to 386,496.80, 579,745.20 and 260,525.60 is: 390,788.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,496.80 : 579,745.20 = 260,525.60 : x
  2. Step 2: Convert to fraction form
    386,496.80/579,745.20 = 260,525.60/x
  3. Step 3: Cross multiply
    386,496.80x = 579,745.20 × 260,525.60
  4. Step 4: Simplify right side
    386,496.80x = 151,038,466,077.12
  5. Step 5: Solve for x
    x = 151,038,466,077.12/386,496.80
  6. Step 6: Final answer
    x = 390,788.40

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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.