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Finding the Third Proportional to 620,909.50 and 910,915.50

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Solution

The third proportional to 620,909.50 and 910,915.50 is: 1,336,373.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,909.50 : 910,915.50 = 910,915.50 : x
  2. Step 2: Convert to fraction form
    620,909.50/910,915.50 = 910,915.50/x
  3. Step 3: Cross multiply
    620,909.50x = 910,915.50 × 910,915.50
  4. Step 4: Simplify right side
    620,909.50x = 829,767,048,140.25
  5. Step 5: Solve for x
    x = 829,767,048,140.25/620,909.50
  6. Step 6: Final answer
    x = 1,336,373.57

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.