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Finding the Fourth Proportional to 378,426.60, 566,862.30 and 191,543.40

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Solution

The fourth proportional to 378,426.60, 566,862.30 and 191,543.40 is: 286,921.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,426.60 : 566,862.30 = 191,543.40 : x
  2. Step 2: Convert to fraction form
    378,426.60/566,862.30 = 191,543.40/x
  3. Step 3: Cross multiply
    378,426.60x = 566,862.30 × 191,543.40
  4. Step 4: Simplify right side
    378,426.60x = 108,578,732,273.82
  5. Step 5: Solve for x
    x = 108,578,732,273.82/378,426.60
  6. Step 6: Final answer
    x = 286,921.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.