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Finding the Fourth Proportional to 630,908.40, 870,649.16 and 344,428.50

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Solution

The fourth proportional to 630,908.40, 870,649.16 and 344,428.50 is: 475,308.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,908.40 : 870,649.16 = 344,428.50 : x
  2. Step 2: Convert to fraction form
    630,908.40/870,649.16 = 344,428.50/x
  3. Step 3: Cross multiply
    630,908.40x = 870,649.16 × 344,428.50
  4. Step 4: Simplify right side
    630,908.40x = 299,876,384,205.06
  5. Step 5: Solve for x
    x = 299,876,384,205.06/630,908.40
  6. Step 6: Final answer
    x = 475,308.91

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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.