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Finding the Fourth Proportional to 380,813.34, 571,268.61 and 127,985.34

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Solution

The fourth proportional to 380,813.34, 571,268.61 and 127,985.34 is: 191,994.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,813.34 : 571,268.61 = 127,985.34 : x
  2. Step 2: Convert to fraction form
    380,813.34/571,268.61 = 127,985.34/x
  3. Step 3: Cross multiply
    380,813.34x = 571,268.61 × 127,985.34
  4. Step 4: Simplify right side
    380,813.34x = 73,114,007,282.18
  5. Step 5: Solve for x
    x = 73,114,007,282.18/380,813.34
  6. Step 6: Final answer
    x = 191,994.34

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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.