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Finding the Fourth Proportional to 617,864.80, 925,630.80 and 317,322.40

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Solution

The fourth proportional to 617,864.80, 925,630.80 and 317,322.40 is: 475,384.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,864.80 : 925,630.80 = 317,322.40 : x
  2. Step 2: Convert to fraction form
    617,864.80/925,630.80 = 317,322.40/x
  3. Step 3: Cross multiply
    617,864.80x = 925,630.80 × 317,322.40
  4. Step 4: Simplify right side
    617,864.80x = 293,723,386,969.92
  5. Step 5: Solve for x
    x = 293,723,386,969.92/617,864.80
  6. Step 6: Final answer
    x = 475,384.56

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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.