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Finding the Fourth Proportional to 630,991.76, 870,665.90 and 372,832.74

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Solution

The fourth proportional to 630,991.76, 870,665.90 and 372,832.74 is: 514,448.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,991.76 : 870,665.90 = 372,832.74 : x
  2. Step 2: Convert to fraction form
    630,991.76/870,665.90 = 372,832.74/x
  3. Step 3: Cross multiply
    630,991.76x = 870,665.90 × 372,832.74
  4. Step 4: Simplify right side
    630,991.76x = 324,612,751,257.40
  5. Step 5: Solve for x
    x = 324,612,751,257.40/630,991.76
  6. Step 6: Final answer
    x = 514,448.48

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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.