Home / 389,904.60-584,813.70-319,661.40

Finding the Fourth Proportional to 389,904.60, 584,813.70 and 319,661.40

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Solution

The fourth proportional to 389,904.60, 584,813.70 and 319,661.40 is: 479,456.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,904.60 : 584,813.70 = 319,661.40 : x
  2. Step 2: Convert to fraction form
    389,904.60/584,813.70 = 319,661.40/x
  3. Step 3: Cross multiply
    389,904.60x = 584,813.70 × 319,661.40
  4. Step 4: Simplify right side
    389,904.60x = 186,942,366,081.18
  5. Step 5: Solve for x
    x = 186,942,366,081.18/389,904.60
  6. Step 6: Final answer
    x = 479,456.68

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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.