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Finding the Fourth Proportional to 702,688.70, 969,710.21 and 380,398.56

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Solution

The fourth proportional to 702,688.70, 969,710.21 and 380,398.56 is: 524,949.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,688.70 : 969,710.21 = 380,398.56 : x
  2. Step 2: Convert to fraction form
    702,688.70/969,710.21 = 380,398.56/x
  3. Step 3: Cross multiply
    702,688.70x = 969,710.21 × 380,398.56
  4. Step 4: Simplify right side
    702,688.70x = 368,876,367,774.14
  5. Step 5: Solve for x
    x = 368,876,367,774.14/702,688.70
  6. Step 6: Final answer
    x = 524,949.91

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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.