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Finding the Fourth Proportional to 630,441.40, 870,007.86 and 343,961.72

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Solution

The fourth proportional to 630,441.40, 870,007.86 and 343,961.72 is: 474,666.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,441.40 : 870,007.86 = 343,961.72 : x
  2. Step 2: Convert to fraction form
    630,441.40/870,007.86 = 343,961.72/x
  3. Step 3: Cross multiply
    630,441.40x = 870,007.86 × 343,961.72
  4. Step 4: Simplify right side
    630,441.40x = 299,249,399,939.12
  5. Step 5: Solve for x
    x = 299,249,399,939.12/630,441.40
  6. Step 6: Final answer
    x = 474,666.48

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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.