Home / 684,784.78-945,305.69-409,239.87

Finding the Fourth Proportional to 684,784.78, 945,305.69 and 409,239.87

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Solution

The fourth proportional to 684,784.78, 945,305.69 and 409,239.87 is: 564,931.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,784.78 : 945,305.69 = 409,239.87 : x
  2. Step 2: Convert to fraction form
    684,784.78/945,305.69 = 409,239.87/x
  3. Step 3: Cross multiply
    684,784.78x = 945,305.69 × 409,239.87
  4. Step 4: Simplify right side
    684,784.78x = 386,856,775,639.66
  5. Step 5: Solve for x
    x = 386,856,775,639.66/684,784.78
  6. Step 6: Final answer
    x = 564,931.91

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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.