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Finding the Fourth Proportional to 553,447.82, 763,815.40 and 338,730.86

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Solution

The fourth proportional to 553,447.82, 763,815.40 and 338,730.86 is: 467,483.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,447.82 : 763,815.40 = 338,730.86 : x
  2. Step 2: Convert to fraction form
    553,447.82/763,815.40 = 338,730.86/x
  3. Step 3: Cross multiply
    553,447.82x = 763,815.40 × 338,730.86
  4. Step 4: Simplify right side
    553,447.82x = 258,727,842,657.34
  5. Step 5: Solve for x
    x = 258,727,842,657.34/553,447.82
  6. Step 6: Final answer
    x = 467,483.72

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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.