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Finding the Fourth Proportional to 610,415.80, 915,623.70 and 397,839.40

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Solution

The fourth proportional to 610,415.80, 915,623.70 and 397,839.40 is: 596,759.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,415.80 : 915,623.70 = 397,839.40 : x
  2. Step 2: Convert to fraction form
    610,415.80/915,623.70 = 397,839.40/x
  3. Step 3: Cross multiply
    610,415.80x = 915,623.70 × 397,839.40
  4. Step 4: Simplify right side
    610,415.80x = 364,271,183,433.78
  5. Step 5: Solve for x
    x = 364,271,183,433.78/610,415.80
  6. Step 6: Final answer
    x = 596,759.10

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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.