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Finding the Fourth Proportional to 890,442.90, 1,335,793.95 and 291,258.90

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Solution

The fourth proportional to 890,442.90, 1,335,793.95 and 291,258.90 is: 436,930.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,442.90 : 1,335,793.95 = 291,258.90 : x
  2. Step 2: Convert to fraction form
    890,442.90/1,335,793.95 = 291,258.90/x
  3. Step 3: Cross multiply
    890,442.90x = 1,335,793.95 × 291,258.90
  4. Step 4: Simplify right side
    890,442.90x = 389,061,876,503.66
  5. Step 5: Solve for x
    x = 389,061,876,503.66/890,442.90
  6. Step 6: Final answer
    x = 436,930.74

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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.