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Finding the Fourth Proportional to 607,426.80, 911,399.40 and 291,721.20

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Solution

The fourth proportional to 607,426.80, 911,399.40 and 291,721.20 is: 437,706.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,426.80 : 911,399.40 = 291,721.20 : x
  2. Step 2: Convert to fraction form
    607,426.80/911,399.40 = 291,721.20/x
  3. Step 3: Cross multiply
    607,426.80x = 911,399.40 × 291,721.20
  4. Step 4: Simplify right side
    607,426.80x = 265,874,526,647.28
  5. Step 5: Solve for x
    x = 265,874,526,647.28/607,426.80
  6. Step 6: Final answer
    x = 437,706.28

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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.