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Finding the Fourth Proportional to 630,953.10, 870,815.22 and 401,270.91

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Solution

The fourth proportional to 630,953.10, 870,815.22 and 401,270.91 is: 553,817.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,953.10 : 870,815.22 = 401,270.91 : x
  2. Step 2: Convert to fraction form
    630,953.10/870,815.22 = 401,270.91/x
  3. Step 3: Cross multiply
    630,953.10x = 870,815.22 × 401,270.91
  4. Step 4: Simplify right side
    630,953.10x = 349,432,815,771.25
  5. Step 5: Solve for x
    x = 349,432,815,771.25/630,953.10
  6. Step 6: Final answer
    x = 553,817.42

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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.