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Finding the Fourth Proportional to 630,785.54, 870,728.12 and 376,155.56

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Solution

The fourth proportional to 630,785.54, 870,728.12 and 376,155.56 is: 519,240.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,785.54 : 870,728.12 = 376,155.56 : x
  2. Step 2: Convert to fraction form
    630,785.54/870,728.12 = 376,155.56/x
  3. Step 3: Cross multiply
    630,785.54x = 870,728.12 × 376,155.56
  4. Step 4: Simplify right side
    630,785.54x = 327,529,217,351.93
  5. Step 5: Solve for x
    x = 327,529,217,351.93/630,785.54
  6. Step 6: Final answer
    x = 519,240.22

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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.