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Finding the Fourth Proportional to 647,490.80, 970,199.40 and 425,615.60

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Solution

The fourth proportional to 647,490.80, 970,199.40 and 425,615.60 is: 637,741.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,490.80 : 970,199.40 = 425,615.60 : x
  2. Step 2: Convert to fraction form
    647,490.80/970,199.40 = 425,615.60/x
  3. Step 3: Cross multiply
    647,490.80x = 970,199.40 × 425,615.60
  4. Step 4: Simplify right side
    647,490.80x = 412,931,999,750.64
  5. Step 5: Solve for x
    x = 412,931,999,750.64/647,490.80
  6. Step 6: Final answer
    x = 637,741.88

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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.