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Finding the Fourth Proportional to 630,981.20, 946,471.80 and 394,785.20

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Solution

The fourth proportional to 630,981.20, 946,471.80 and 394,785.20 is: 592,177.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,981.20 : 946,471.80 = 394,785.20 : x
  2. Step 2: Convert to fraction form
    630,981.20/946,471.80 = 394,785.20/x
  3. Step 3: Cross multiply
    630,981.20x = 946,471.80 × 394,785.20
  4. Step 4: Simplify right side
    630,981.20x = 373,653,058,857.36
  5. Step 5: Solve for x
    x = 373,653,058,857.36/630,981.20
  6. Step 6: Final answer
    x = 592,177.80

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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.