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Finding the Fourth Proportional to 283,429.54, 390,808.29 and 211,688.38

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Solution

The fourth proportional to 283,429.54, 390,808.29 and 211,688.38 is: 291,887.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,429.54 : 390,808.29 = 211,688.38 : x
  2. Step 2: Convert to fraction form
    283,429.54/390,808.29 = 211,688.38/x
  3. Step 3: Cross multiply
    283,429.54x = 390,808.29 × 211,688.38
  4. Step 4: Simplify right side
    283,429.54x = 82,729,573,800.67
  5. Step 5: Solve for x
    x = 82,729,573,800.67/283,429.54
  6. Step 6: Final answer
    x = 291,887.62

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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.