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Finding the Fourth Proportional to 630,732.72, 870,278.16 and 401,206.56

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Solution

The fourth proportional to 630,732.72, 870,278.16 and 401,206.56 is: 553,580.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,732.72 : 870,278.16 = 401,206.56 : x
  2. Step 2: Convert to fraction form
    630,732.72/870,278.16 = 401,206.56/x
  3. Step 3: Cross multiply
    630,732.72x = 870,278.16 × 401,206.56
  4. Step 4: Simplify right side
    630,732.72x = 349,161,306,816.73
  5. Step 5: Solve for x
    x = 349,161,306,816.73/630,732.72
  6. Step 6: Final answer
    x = 553,580.46

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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.