Home / 568,619,998.20-784,816,830.54-390,247,889.40

Finding the Fourth Proportional to 568,619,998.20, 784,816,830.54 and 390,247,889.40

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Solution

The fourth proportional to 568,619,998.20, 784,816,830.54 and 390,247,889.40 is: 538,625,290.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    568,619,998.20 : 784,816,830.54 = 390,247,889.40 : x
  2. Step 2: Convert to fraction form
    568,619,998.20/784,816,830.54 = 390,247,889.40/x
  3. Step 3: Cross multiply
    568,619,998.20x = 784,816,830.54 × 390,247,889.40
  4. Step 4: Simplify right side
    568,619,998.20x = 306,273,111,683,832,448
  5. Step 5: Solve for x
    x = 306,273,111,683,832,448/568,619,998.20
  6. Step 6: Final answer
    x = 538,625,290.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.