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Finding the Fourth Proportional to 613,523.60, 920,438.04 and 487,638.80

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Solution

The fourth proportional to 613,523.60, 920,438.04 and 487,638.80 is: 731,579.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,523.60 : 920,438.04 = 487,638.80 : x
  2. Step 2: Convert to fraction form
    613,523.60/920,438.04 = 487,638.80/x
  3. Step 3: Cross multiply
    613,523.60x = 920,438.04 × 487,638.80
  4. Step 4: Simplify right side
    613,523.60x = 448,841,301,299.95
  5. Step 5: Solve for x
    x = 448,841,301,299.95/613,523.60
  6. Step 6: Final answer
    x = 731,579.52

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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.