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Finding the Fourth Proportional to 1,314,403.70, 1,971,605.55 and 865,631.30

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Solution

The fourth proportional to 1,314,403.70, 1,971,605.55 and 865,631.30 is: 1,298,446.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,314,403.70 : 1,971,605.55 = 865,631.30 : x
  2. Step 2: Convert to fraction form
    1,314,403.70/1,971,605.55 = 865,631.30/x
  3. Step 3: Cross multiply
    1,314,403.70x = 1,971,605.55 × 865,631.30
  4. Step 4: Simplify right side
    1,314,403.70x = 1,706,683,475,333.72
  5. Step 5: Solve for x
    x = 1,706,683,475,333.72/1,314,403.70
  6. Step 6: Final answer
    x = 1,298,446.95

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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.