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Finding the Fourth Proportional to 553,803.89, 830,705.74 and 133,079.76

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Solution

The fourth proportional to 553,803.89, 830,705.74 and 133,079.76 is: 199,619.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,803.89 : 830,705.74 = 133,079.76 : x
  2. Step 2: Convert to fraction form
    553,803.89/830,705.74 = 133,079.76/x
  3. Step 3: Cross multiply
    553,803.89x = 830,705.74 × 133,079.76
  4. Step 4: Simplify right side
    553,803.89x = 110,550,120,177.12
  5. Step 5: Solve for x
    x = 110,550,120,177.12/553,803.89
  6. Step 6: Final answer
    x = 199,619.62

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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.