Home / 643,457.93-887,942.34-353,063.12

Finding the Fourth Proportional to 643,457.93, 887,942.34 and 353,063.12

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Solution

The fourth proportional to 643,457.93, 887,942.34 and 353,063.12 is: 487,210.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,457.93 : 887,942.34 = 353,063.12 : x
  2. Step 2: Convert to fraction form
    643,457.93/887,942.34 = 353,063.12/x
  3. Step 3: Cross multiply
    643,457.93x = 887,942.34 × 353,063.12
  4. Step 4: Simplify right side
    643,457.93x = 313,499,688,500.79
  5. Step 5: Solve for x
    x = 313,499,688,500.79/643,457.93
  6. Step 6: Final answer
    x = 487,210.86

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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.