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Finding the Fourth Proportional to 1,315,311.40, 1,971,982.95 and 716,948.20

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Solution

The fourth proportional to 1,315,311.40, 1,971,982.95 and 716,948.20 is: 1,074,885.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,311.40 : 1,971,982.95 = 716,948.20 : x
  2. Step 2: Convert to fraction form
    1,315,311.40/1,971,982.95 = 716,948.20/x
  3. Step 3: Cross multiply
    1,315,311.40x = 1,971,982.95 × 716,948.20
  4. Step 4: Simplify right side
    1,315,311.40x = 1,413,809,626,433.19
  5. Step 5: Solve for x
    x = 1,413,809,626,433.19/1,315,311.40
  6. Step 6: Final answer
    x = 1,074,885.86

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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.