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Finding the Fourth Proportional to 887,689, 1,225,015.14 and 485,281

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Solution

The fourth proportional to 887,689, 1,225,015.14 and 485,281 is: 669,690.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,689 : 1,225,015.14 = 485,281 : x
  2. Step 2: Convert to fraction form
    887,689/1,225,015.14 = 485,281/x
  3. Step 3: Cross multiply
    887,689x = 1,225,015.14 × 485,281
  4. Step 4: Simplify right side
    887,689x = 594,476,572,154.34
  5. Step 5: Solve for x
    x = 594,476,572,154.34/887,689
  6. Step 6: Final answer
    x = 669,690.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.