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Finding the Fourth Proportional to 617,686.80, 926,573.40 and 243,661.20

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Solution

The fourth proportional to 617,686.80, 926,573.40 and 243,661.20 is: 365,508.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,686.80 : 926,573.40 = 243,661.20 : x
  2. Step 2: Convert to fraction form
    617,686.80/926,573.40 = 243,661.20/x
  3. Step 3: Cross multiply
    617,686.80x = 926,573.40 × 243,661.20
  4. Step 4: Simplify right side
    617,686.80x = 225,769,986,532.08
  5. Step 5: Solve for x
    x = 225,769,986,532.08/617,686.80
  6. Step 6: Final answer
    x = 365,508.84

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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.