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Finding the Fourth Proportional to 661,314.60, 991,971.90 and 425,118.60

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Solution

The fourth proportional to 661,314.60, 991,971.90 and 425,118.60 is: 637,677.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,314.60 : 991,971.90 = 425,118.60 : x
  2. Step 2: Convert to fraction form
    661,314.60/991,971.90 = 425,118.60/x
  3. Step 3: Cross multiply
    661,314.60x = 991,971.90 × 425,118.60
  4. Step 4: Simplify right side
    661,314.60x = 421,705,705,367.34
  5. Step 5: Solve for x
    x = 421,705,705,367.34/661,314.60
  6. Step 6: Final answer
    x = 637,677.90

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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.