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Finding the Fourth Proportional to 407,813.40, 611,720.10 and 376,320.60

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Solution

The fourth proportional to 407,813.40, 611,720.10 and 376,320.60 is: 564,480.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,813.40 : 611,720.10 = 376,320.60 : x
  2. Step 2: Convert to fraction form
    407,813.40/611,720.10 = 376,320.60/x
  3. Step 3: Cross multiply
    407,813.40x = 611,720.10 × 376,320.60
  4. Step 4: Simplify right side
    407,813.40x = 230,202,875,064.06
  5. Step 5: Solve for x
    x = 230,202,875,064.06/407,813.40
  6. Step 6: Final answer
    x = 564,480.90

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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.