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Finding the Fourth Proportional to 399,725.34, 551,567.88 and 256,679.16

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Solution

The fourth proportional to 399,725.34, 551,567.88 and 256,679.16 is: 354,183.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,725.34 : 551,567.88 = 256,679.16 : x
  2. Step 2: Convert to fraction form
    399,725.34/551,567.88 = 256,679.16/x
  3. Step 3: Cross multiply
    399,725.34x = 551,567.88 × 256,679.16
  4. Step 4: Simplify right side
    399,725.34x = 141,575,980,121.38
  5. Step 5: Solve for x
    x = 141,575,980,121.38/399,725.34
  6. Step 6: Final answer
    x = 354,183.15

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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.