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Finding the Fourth Proportional to 371,489.64, 512,661.20 and 210,340.14

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Solution

The fourth proportional to 371,489.64, 512,661.20 and 210,340.14 is: 290,272.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,489.64 : 512,661.20 = 210,340.14 : x
  2. Step 2: Convert to fraction form
    371,489.64/512,661.20 = 210,340.14/x
  3. Step 3: Cross multiply
    371,489.64x = 512,661.20 × 210,340.14
  4. Step 4: Simplify right side
    371,489.64x = 107,833,227,528.87
  5. Step 5: Solve for x
    x = 107,833,227,528.87/371,489.64
  6. Step 6: Final answer
    x = 290,272.50

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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.