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Finding the Fourth Proportional to 666,099.72, 999,477.60 and 311,062.20

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Solution

The fourth proportional to 666,099.72, 999,477.60 and 311,062.20 is: 466,746.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,099.72 : 999,477.60 = 311,062.20 : x
  2. Step 2: Convert to fraction form
    666,099.72/999,477.60 = 311,062.20/x
  3. Step 3: Cross multiply
    666,099.72x = 999,477.60 × 311,062.20
  4. Step 4: Simplify right side
    666,099.72x = 310,899,701,106.72
  5. Step 5: Solve for x
    x = 310,899,701,106.72/666,099.72
  6. Step 6: Final answer
    x = 466,746.48

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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.