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Finding the Fourth Proportional to 219,486.64, 328,413.48 and 130,788.40

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Solution

The fourth proportional to 219,486.64, 328,413.48 and 130,788.40 is: 195,696.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,486.64 : 328,413.48 = 130,788.40 : x
  2. Step 2: Convert to fraction form
    219,486.64/328,413.48 = 130,788.40/x
  3. Step 3: Cross multiply
    219,486.64x = 328,413.48 × 130,788.40
  4. Step 4: Simplify right side
    219,486.64x = 42,952,673,587.63
  5. Step 5: Solve for x
    x = 42,952,673,587.63/219,486.64
  6. Step 6: Final answer
    x = 195,696.07

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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.