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Finding the Fourth Proportional to 630,921.91, 870,748.64 and 359,055.94

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Solution

The fourth proportional to 630,921.91, 870,748.64 and 359,055.94 is: 495,540.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,921.91 : 870,748.64 = 359,055.94 : x
  2. Step 2: Convert to fraction form
    630,921.91/870,748.64 = 359,055.94/x
  3. Step 3: Cross multiply
    630,921.91x = 870,748.64 × 359,055.94
  4. Step 4: Simplify right side
    630,921.91x = 312,647,471,438.92
  5. Step 5: Solve for x
    x = 312,647,471,438.92/630,921.91
  6. Step 6: Final answer
    x = 495,540.68

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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.