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Finding the Fourth Proportional to 407,136.60, 561,851.88 and 225,860.40

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Solution

The fourth proportional to 407,136.60, 561,851.88 and 225,860.40 is: 311,689.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,136.60 : 561,851.88 = 225,860.40 : x
  2. Step 2: Convert to fraction form
    407,136.60/561,851.88 = 225,860.40/x
  3. Step 3: Cross multiply
    407,136.60x = 561,851.88 × 225,860.40
  4. Step 4: Simplify right side
    407,136.60x = 126,900,090,357.55
  5. Step 5: Solve for x
    x = 126,900,090,357.55/407,136.60
  6. Step 6: Final answer
    x = 311,689.22

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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.