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Finding the Fourth Proportional to 399,459.57, 551,251.25 and 218,171.58

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Solution

The fourth proportional to 399,459.57, 551,251.25 and 218,171.58 is: 301,075.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,459.57 : 551,251.25 = 218,171.58 : x
  2. Step 2: Convert to fraction form
    399,459.57/551,251.25 = 218,171.58/x
  3. Step 3: Cross multiply
    399,459.57x = 551,251.25 × 218,171.58
  4. Step 4: Simplify right side
    399,459.57x = 120,267,355,916.76
  5. Step 5: Solve for x
    x = 120,267,355,916.76/399,459.57
  6. Step 6: Final answer
    x = 301,075.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.