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Finding the Fourth Proportional to 386,291.20, 579,436.80 and 386,291.20

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Solution

The fourth proportional to 386,291.20, 579,436.80 and 386,291.20 is: 579,436.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,291.20 : 579,436.80 = 386,291.20 : x
  2. Step 2: Convert to fraction form
    386,291.20/579,436.80 = 386,291.20/x
  3. Step 3: Cross multiply
    386,291.20x = 579,436.80 × 386,291.20
  4. Step 4: Simplify right side
    386,291.20x = 223,831,336,796.16
  5. Step 5: Solve for x
    x = 223,831,336,796.16/386,291.20
  6. Step 6: Final answer
    x = 579,436.80

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1.5x scale

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.