Home / 390,831,217.87-586,265,680.11-128,509,961.04

Finding the Fourth Proportional to 390,831,217.87, 586,265,680.11 and 128,509,961.04

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Solution

The fourth proportional to 390,831,217.87, 586,265,680.11 and 128,509,961.04 is: 192,771,140.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,831,217.87 : 586,265,680.11 = 128,509,961.04 : x
  2. Step 2: Convert to fraction form
    390,831,217.87/586,265,680.11 = 128,509,961.04/x
  3. Step 3: Cross multiply
    390,831,217.87x = 586,265,680.11 × 128,509,961.04
  4. Step 4: Simplify right side
    390,831,217.87x = 75,340,979,707,093,872
  5. Step 5: Solve for x
    x = 75,340,979,707,093,872/390,831,217.87
  6. Step 6: Final answer
    x = 192,771,140.74

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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.