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Finding the Fourth Proportional to 630,730.72, 870,404.70 and 358,797.88

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Solution

The fourth proportional to 630,730.72, 870,404.70 and 358,797.88 is: 495,138.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,730.72 : 870,404.70 = 358,797.88 : x
  2. Step 2: Convert to fraction form
    630,730.72/870,404.70 = 358,797.88/x
  3. Step 3: Cross multiply
    630,730.72x = 870,404.70 × 358,797.88
  4. Step 4: Simplify right side
    630,730.72x = 312,299,361,102.04
  5. Step 5: Solve for x
    x = 312,299,361,102.04/630,730.72
  6. Step 6: Final answer
    x = 495,138.97

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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.