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Finding the Fourth Proportional to 890,965.64, 1,336,312.62 and 291,989

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Solution

The fourth proportional to 890,965.64, 1,336,312.62 and 291,989 is: 437,938.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,965.64 : 1,336,312.62 = 291,989 : x
  2. Step 2: Convert to fraction form
    890,965.64/1,336,312.62 = 291,989/x
  3. Step 3: Cross multiply
    890,965.64x = 1,336,312.62 × 291,989
  4. Step 4: Simplify right side
    890,965.64x = 390,188,585,601.18
  5. Step 5: Solve for x
    x = 390,188,585,601.18/890,965.64
  6. Step 6: Final answer
    x = 437,938.98

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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.