Home / 642,350.20-886,086.12-505,881.40

Finding the Fourth Proportional to 642,350.20, 886,086.12 and 505,881.40

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Solution

The fourth proportional to 642,350.20, 886,086.12 and 505,881.40 is: 697,835.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,350.20 : 886,086.12 = 505,881.40 : x
  2. Step 2: Convert to fraction form
    642,350.20/886,086.12 = 505,881.40/x
  3. Step 3: Cross multiply
    642,350.20x = 886,086.12 × 505,881.40
  4. Step 4: Simplify right side
    642,350.20x = 448,254,486,906.17
  5. Step 5: Solve for x
    x = 448,254,486,906.17/642,350.20
  6. Step 6: Final answer
    x = 697,835.05

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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.