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Finding the Fourth Proportional to 630,790.50, 870,491.70 and 404,436

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Solution

The fourth proportional to 630,790.50, 870,491.70 and 404,436 is: 558,122.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,790.50 : 870,491.70 = 404,436 : x
  2. Step 2: Convert to fraction form
    630,790.50/870,491.70 = 404,436/x
  3. Step 3: Cross multiply
    630,790.50x = 870,491.70 × 404,436
  4. Step 4: Simplify right side
    630,790.50x = 352,058,181,181.20
  5. Step 5: Solve for x
    x = 352,058,181,181.20/630,790.50
  6. Step 6: Final answer
    x = 558,122.20

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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.