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Finding the Fourth Proportional to 208,210.88, 312,440.75 and 191,271.20

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Solution

The fourth proportional to 208,210.88, 312,440.75 and 191,271.20 is: 287,021.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,210.88 : 312,440.75 = 191,271.20 : x
  2. Step 2: Convert to fraction form
    208,210.88/312,440.75 = 191,271.20/x
  3. Step 3: Cross multiply
    208,210.88x = 312,440.75 × 191,271.20
  4. Step 4: Simplify right side
    208,210.88x = 59,760,917,052.39
  5. Step 5: Solve for x
    x = 59,760,917,052.39/208,210.88
  6. Step 6: Final answer
    x = 287,021.10

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1.5x scale

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.