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Finding the Fourth Proportional to 656,462.75, 905,918.61 and 354,656.75

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Solution

The fourth proportional to 656,462.75, 905,918.61 and 354,656.75 is: 489,426.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,462.75 : 905,918.61 = 354,656.75 : x
  2. Step 2: Convert to fraction form
    656,462.75/905,918.61 = 354,656.75/x
  3. Step 3: Cross multiply
    656,462.75x = 905,918.61 × 354,656.75
  4. Step 4: Simplify right side
    656,462.75x = 321,290,149,987.12
  5. Step 5: Solve for x
    x = 321,290,149,987.12/656,462.75
  6. Step 6: Final answer
    x = 489,426.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.