Home / 1,336,989.52-2,005,269.36-390,138.40

Finding the Fourth Proportional to 1,336,989.52, 2,005,269.36 and 390,138.40

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Solution

The fourth proportional to 1,336,989.52, 2,005,269.36 and 390,138.40 is: 585,144.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336,989.52 : 2,005,269.36 = 390,138.40 : x
  2. Step 2: Convert to fraction form
    1,336,989.52/2,005,269.36 = 390,138.40/x
  3. Step 3: Cross multiply
    1,336,989.52x = 2,005,269.36 × 390,138.40
  4. Step 4: Simplify right side
    1,336,989.52x = 782,332,579,679.42
  5. Step 5: Solve for x
    x = 782,332,579,679.42/1,336,989.52
  6. Step 6: Final answer
    x = 585,144.89

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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.