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Finding the Fourth Proportional to 806,638.76, 1,210,705.82 and 407,560.01

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Solution

The fourth proportional to 806,638.76, 1,210,705.82 and 407,560.01 is: 611,717.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,638.76 : 1,210,705.82 = 407,560.01 : x
  2. Step 2: Convert to fraction form
    806,638.76/1,210,705.82 = 407,560.01/x
  3. Step 3: Cross multiply
    806,638.76x = 1,210,705.82 × 407,560.01
  4. Step 4: Simplify right side
    806,638.76x = 493,435,280,151.92
  5. Step 5: Solve for x
    x = 493,435,280,151.92/806,638.76
  6. Step 6: Final answer
    x = 611,717.79

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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.