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Finding the Fourth Proportional to 668,715.80, 922,820.10 and 366,909.80

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Solution

The fourth proportional to 668,715.80, 922,820.10 and 366,909.80 is: 506,331.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,715.80 : 922,820.10 = 366,909.80 : x
  2. Step 2: Convert to fraction form
    668,715.80/922,820.10 = 366,909.80/x
  3. Step 3: Cross multiply
    668,715.80x = 922,820.10 × 366,909.80
  4. Step 4: Simplify right side
    668,715.80x = 338,591,738,326.98
  5. Step 5: Solve for x
    x = 338,591,738,326.98/668,715.80
  6. Step 6: Final answer
    x = 506,331.30

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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.