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Finding the Fourth Proportional to 380,291.55, 570,400.16 and 99,808.80

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Solution

The fourth proportional to 380,291.55, 570,400.16 and 99,808.80 is: 149,703.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,291.55 : 570,400.16 = 99,808.80 : x
  2. Step 2: Convert to fraction form
    380,291.55/570,400.16 = 99,808.80/x
  3. Step 3: Cross multiply
    380,291.55x = 570,400.16 × 99,808.80
  4. Step 4: Simplify right side
    380,291.55x = 56,930,954,990.36
  5. Step 5: Solve for x
    x = 56,930,954,990.36/380,291.55
  6. Step 6: Final answer
    x = 149,703.44

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1.5x scale

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.