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Finding the Fourth Proportional to 386,294.40, 578,750.40 and 330,998.40

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Solution

The fourth proportional to 386,294.40, 578,750.40 and 330,998.40 is: 495,905.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,294.40 : 578,750.40 = 330,998.40 : x
  2. Step 2: Convert to fraction form
    386,294.40/578,750.40 = 330,998.40/x
  3. Step 3: Cross multiply
    386,294.40x = 578,750.40 × 330,998.40
  4. Step 4: Simplify right side
    386,294.40x = 191,565,456,399.36
  5. Step 5: Solve for x
    x = 191,565,456,399.36/386,294.40
  6. Step 6: Final answer
    x = 495,905.34

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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.