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Finding the Fourth Proportional to 3,949,715.79, 5,924,573.15 and 1,390,328.01

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Solution

The fourth proportional to 3,949,715.79, 5,924,573.15 and 1,390,328.01 is: 2,085,491.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,949,715.79 : 5,924,573.15 = 1,390,328.01 : x
  2. Step 2: Convert to fraction form
    3,949,715.79/5,924,573.15 = 1,390,328.01/x
  3. Step 3: Cross multiply
    3,949,715.79x = 5,924,573.15 × 1,390,328.01
  4. Step 4: Simplify right side
    3,949,715.79x = 8,237,099,990,787.29
  5. Step 5: Solve for x
    x = 8,237,099,990,787.29/3,949,715.79
  6. Step 6: Final answer
    x = 2,085,491.82

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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.