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Finding the Fourth Proportional to 620,292.10, 930,438.15 and 407,715.70

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Solution

The fourth proportional to 620,292.10, 930,438.15 and 407,715.70 is: 611,573.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,292.10 : 930,438.15 = 407,715.70 : x
  2. Step 2: Convert to fraction form
    620,292.10/930,438.15 = 407,715.70/x
  3. Step 3: Cross multiply
    620,292.10x = 930,438.15 × 407,715.70
  4. Step 4: Simplify right side
    620,292.10x = 379,354,241,633.96
  5. Step 5: Solve for x
    x = 379,354,241,633.96/620,292.10
  6. Step 6: Final answer
    x = 611,573.55

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Similar ratio
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1.5x scale

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.