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Finding the Fourth Proportional to 399,319.53, 551,056.75 and 218,030.89

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Solution

The fourth proportional to 399,319.53, 551,056.75 and 218,030.89 is: 300,880.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,319.53 : 551,056.75 = 218,030.89 : x
  2. Step 2: Convert to fraction form
    399,319.53/551,056.75 = 218,030.89/x
  3. Step 3: Cross multiply
    399,319.53x = 551,056.75 × 218,030.89
  4. Step 4: Simplify right side
    399,319.53x = 120,147,393,643.01
  5. Step 5: Solve for x
    x = 120,147,393,643.01/399,319.53
  6. Step 6: Final answer
    x = 300,880.33

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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.