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Finding the Fourth Proportional to 385,553.70, 578,330.55 and 271,392.30

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Solution

The fourth proportional to 385,553.70, 578,330.55 and 271,392.30 is: 407,088.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,553.70 : 578,330.55 = 271,392.30 : x
  2. Step 2: Convert to fraction form
    385,553.70/578,330.55 = 271,392.30/x
  3. Step 3: Cross multiply
    385,553.70x = 578,330.55 × 271,392.30
  4. Step 4: Simplify right side
    385,553.70x = 156,954,458,124.77
  5. Step 5: Solve for x
    x = 156,954,458,124.77/385,553.70
  6. Step 6: Final answer
    x = 407,088.45

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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.