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Finding the Fourth Proportional to 660,286.80, 990,430.20 and 565,808.40

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Solution

The fourth proportional to 660,286.80, 990,430.20 and 565,808.40 is: 848,712.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,286.80 : 990,430.20 = 565,808.40 : x
  2. Step 2: Convert to fraction form
    660,286.80/990,430.20 = 565,808.40/x
  3. Step 3: Cross multiply
    660,286.80x = 990,430.20 × 565,808.40
  4. Step 4: Simplify right side
    660,286.80x = 560,393,726,773.68
  5. Step 5: Solve for x
    x = 560,393,726,773.68/660,286.80
  6. Step 6: Final answer
    x = 848,712.60

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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.