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Finding the Fourth Proportional to 522,807.40, 784,988.70 and 404,612.20

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Solution

The fourth proportional to 522,807.40, 784,988.70 and 404,612.20 is: 607,520.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,807.40 : 784,988.70 = 404,612.20 : x
  2. Step 2: Convert to fraction form
    522,807.40/784,988.70 = 404,612.20/x
  3. Step 3: Cross multiply
    522,807.40x = 784,988.70 × 404,612.20
  4. Step 4: Simplify right side
    522,807.40x = 317,616,004,882.14
  5. Step 5: Solve for x
    x = 317,616,004,882.14/522,807.40
  6. Step 6: Final answer
    x = 607,520.10

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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.