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Finding the Fourth Proportional to 642,262.12, 886,336.46 and 351,901.40

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Solution

The fourth proportional to 642,262.12, 886,336.46 and 351,901.40 is: 485,632.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,262.12 : 886,336.46 = 351,901.40 : x
  2. Step 2: Convert to fraction form
    642,262.12/886,336.46 = 351,901.40/x
  3. Step 3: Cross multiply
    642,262.12x = 886,336.46 × 351,901.40
  4. Step 4: Simplify right side
    642,262.12x = 311,903,041,145.04
  5. Step 5: Solve for x
    x = 311,903,041,145.04/642,262.12
  6. Step 6: Final answer
    x = 485,632.01

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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.