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Finding the Fourth Proportional to 412,316.70, 618,935.85 and 385,244.70

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Solution

The fourth proportional to 412,316.70, 618,935.85 and 385,244.70 is: 578,297.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,316.70 : 618,935.85 = 385,244.70 : x
  2. Step 2: Convert to fraction form
    412,316.70/618,935.85 = 385,244.70/x
  3. Step 3: Cross multiply
    412,316.70x = 618,935.85 × 385,244.70
  4. Step 4: Simplify right side
    412,316.70x = 238,441,755,852.50
  5. Step 5: Solve for x
    x = 238,441,755,852.50/412,316.70
  6. Step 6: Final answer
    x = 578,297.59

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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.