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Finding the Fourth Proportional to 890,968.64, 1,336,317.12 and 291,992

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Solution

The fourth proportional to 890,968.64, 1,336,317.12 and 291,992 is: 437,943.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,968.64 : 1,336,317.12 = 291,992 : x
  2. Step 2: Convert to fraction form
    890,968.64/1,336,317.12 = 291,992/x
  3. Step 3: Cross multiply
    890,968.64x = 1,336,317.12 × 291,992
  4. Step 4: Simplify right side
    890,968.64x = 390,193,908,503.04
  5. Step 5: Solve for x
    x = 390,193,908,503.04/890,968.64
  6. Step 6: Final answer
    x = 437,943.48

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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.