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Finding the Fourth Proportional to 630,441.81, 870,012.59 and 343,967.85

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Solution

The fourth proportional to 630,441.81, 870,012.59 and 343,967.85 is: 474,677.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,441.81 : 870,012.59 = 343,967.85 : x
  2. Step 2: Convert to fraction form
    630,441.81/870,012.59 = 343,967.85/x
  3. Step 3: Cross multiply
    630,441.81x = 870,012.59 × 343,967.85
  4. Step 4: Simplify right side
    630,441.81x = 299,256,358,335.39
  5. Step 5: Solve for x
    x = 299,256,358,335.39/630,441.81
  6. Step 6: Final answer
    x = 474,677.21

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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.