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Finding the Fourth Proportional to 630,439.88, 870,007.03 and 404,085.38

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Solution

The fourth proportional to 630,439.88, 870,007.03 and 404,085.38 is: 557,637.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,439.88 : 870,007.03 = 404,085.38 : x
  2. Step 2: Convert to fraction form
    630,439.88/870,007.03 = 404,085.38/x
  3. Step 3: Cross multiply
    630,439.88x = 870,007.03 × 404,085.38
  4. Step 4: Simplify right side
    630,439.88x = 351,557,115,959.97
  5. Step 5: Solve for x
    x = 351,557,115,959.97/630,439.88
  6. Step 6: Final answer
    x = 557,637.82

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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.