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Finding the Fourth Proportional to 630,415.94, 869,998.39 and 358,508.66

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Solution

The fourth proportional to 630,415.94, 869,998.39 and 358,508.66 is: 494,755.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,415.94 : 869,998.39 = 358,508.66 : x
  2. Step 2: Convert to fraction form
    630,415.94/869,998.39 = 358,508.66/x
  3. Step 3: Cross multiply
    630,415.94x = 869,998.39 × 358,508.66
  4. Step 4: Simplify right side
    630,415.94x = 311,901,951,754.79
  5. Step 5: Solve for x
    x = 311,901,951,754.79/630,415.94
  6. Step 6: Final answer
    x = 494,755.82

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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.