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Finding the Fourth Proportional to 386,415.60, 579,623.40 and 268,220.40

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Solution

The fourth proportional to 386,415.60, 579,623.40 and 268,220.40 is: 402,330.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,415.60 : 579,623.40 = 268,220.40 : x
  2. Step 2: Convert to fraction form
    386,415.60/579,623.40 = 268,220.40/x
  3. Step 3: Cross multiply
    386,415.60x = 579,623.40 × 268,220.40
  4. Step 4: Simplify right side
    386,415.60x = 155,466,820,197.36
  5. Step 5: Solve for x
    x = 155,466,820,197.36/386,415.60
  6. Step 6: Final answer
    x = 402,330.60

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Similar ratio
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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.