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Finding the Fourth Proportional to 639,763.84, 882,874.38 and 353,303.38

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Solution

The fourth proportional to 639,763.84, 882,874.38 and 353,303.38 is: 487,558.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,763.84 : 882,874.38 = 353,303.38 : x
  2. Step 2: Convert to fraction form
    639,763.84/882,874.38 = 353,303.38/x
  3. Step 3: Cross multiply
    639,763.84x = 882,874.38 × 353,303.38
  4. Step 4: Simplify right side
    639,763.84x = 311,922,502,569.40
  5. Step 5: Solve for x
    x = 311,922,502,569.40/639,763.84
  6. Step 6: Final answer
    x = 487,558.82

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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.