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Finding the Fourth Proportional to 380,291.62, 570,394.23 and 99,830.74

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Solution

The fourth proportional to 380,291.62, 570,394.23 and 99,830.74 is: 149,734.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,291.62 : 570,394.23 = 99,830.74 : x
  2. Step 2: Convert to fraction form
    380,291.62/570,394.23 = 99,830.74/x
  3. Step 3: Cross multiply
    380,291.62x = 570,394.23 × 99,830.74
  4. Step 4: Simplify right side
    380,291.62x = 56,942,878,072.63
  5. Step 5: Solve for x
    x = 56,942,878,072.63/380,291.62
  6. Step 6: Final answer
    x = 149,734.77

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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.