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Finding the Fourth Proportional to 285,625.70, 428,438.55 and 145,657.70

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Solution

The fourth proportional to 285,625.70, 428,438.55 and 145,657.70 is: 218,486.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,625.70 : 428,438.55 = 145,657.70 : x
  2. Step 2: Convert to fraction form
    285,625.70/428,438.55 = 145,657.70/x
  3. Step 3: Cross multiply
    285,625.70x = 428,438.55 × 145,657.70
  4. Step 4: Simplify right side
    285,625.70x = 62,405,373,784.34
  5. Step 5: Solve for x
    x = 62,405,373,784.34/285,625.70
  6. Step 6: Final answer
    x = 218,486.55

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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.