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Finding the Fourth Proportional to 346,999.76, 520,503.36 and 122,318.40

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Solution

The fourth proportional to 346,999.76, 520,503.36 and 122,318.40 is: 183,478.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,999.76 : 520,503.36 = 122,318.40 : x
  2. Step 2: Convert to fraction form
    346,999.76/520,503.36 = 122,318.40/x
  3. Step 3: Cross multiply
    346,999.76x = 520,503.36 × 122,318.40
  4. Step 4: Simplify right side
    346,999.76x = 63,667,138,189.82
  5. Step 5: Solve for x
    x = 63,667,138,189.82/346,999.76
  6. Step 6: Final answer
    x = 183,478.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.