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Finding the Fourth Proportional to 659,421.60, 989,132.40 and 620,055.60

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Solution

The fourth proportional to 659,421.60, 989,132.40 and 620,055.60 is: 930,083.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,421.60 : 989,132.40 = 620,055.60 : x
  2. Step 2: Convert to fraction form
    659,421.60/989,132.40 = 620,055.60/x
  3. Step 3: Cross multiply
    659,421.60x = 989,132.40 × 620,055.60
  4. Step 4: Simplify right side
    659,421.60x = 613,317,083,761.44
  5. Step 5: Solve for x
    x = 613,317,083,761.44/659,421.60
  6. Step 6: Final answer
    x = 930,083.40

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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.