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Finding the Fourth Proportional to 931,503.90, 1,397,255.85 and 813,405.90

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Solution

The fourth proportional to 931,503.90, 1,397,255.85 and 813,405.90 is: 1,220,108.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    931,503.90 : 1,397,255.85 = 813,405.90 : x
  2. Step 2: Convert to fraction form
    931,503.90/1,397,255.85 = 813,405.90/x
  3. Step 3: Cross multiply
    931,503.90x = 1,397,255.85 × 813,405.90
  4. Step 4: Simplify right side
    931,503.90x = 1,136,536,152,199.52
  5. Step 5: Solve for x
    x = 1,136,536,152,199.52/931,503.90
  6. Step 6: Final answer
    x = 1,220,108.85

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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.