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Finding the Fourth Proportional to 611,306.10, 917,396.55 and 256,574.70

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Solution

The fourth proportional to 611,306.10, 917,396.55 and 256,574.70 is: 385,045.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,306.10 : 917,396.55 = 256,574.70 : x
  2. Step 2: Convert to fraction form
    611,306.10/917,396.55 = 256,574.70/x
  3. Step 3: Cross multiply
    611,306.10x = 917,396.55 × 256,574.70
  4. Step 4: Simplify right side
    611,306.10x = 235,380,744,597.29
  5. Step 5: Solve for x
    x = 235,380,744,597.29/611,306.10
  6. Step 6: Final answer
    x = 385,045.63

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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.