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Finding the Fourth Proportional to 811,892.60, 1,217,838.90 and 779,233.40

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Solution

The fourth proportional to 811,892.60, 1,217,838.90 and 779,233.40 is: 1,168,850.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,892.60 : 1,217,838.90 = 779,233.40 : x
  2. Step 2: Convert to fraction form
    811,892.60/1,217,838.90 = 779,233.40/x
  3. Step 3: Cross multiply
    811,892.60x = 1,217,838.90 × 779,233.40
  4. Step 4: Simplify right side
    811,892.60x = 948,980,746,699.26
  5. Step 5: Solve for x
    x = 948,980,746,699.26/811,892.60
  6. Step 6: Final answer
    x = 1,168,850.10

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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.