Home / 684,785.78-945,307.07-409,240.87

Finding the Fourth Proportional to 684,785.78, 945,307.07 and 409,240.87

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Solution

The fourth proportional to 684,785.78, 945,307.07 and 409,240.87 is: 564,933.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,785.78 : 945,307.07 = 409,240.87 : x
  2. Step 2: Convert to fraction form
    684,785.78/945,307.07 = 409,240.87/x
  3. Step 3: Cross multiply
    684,785.78x = 945,307.07 × 409,240.87
  4. Step 4: Simplify right side
    684,785.78x = 386,858,287,743.95
  5. Step 5: Solve for x
    x = 386,858,287,743.95/684,785.78
  6. Step 6: Final answer
    x = 564,933.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.