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Finding the Fourth Proportional to 289,413.60, 399,368.88 and 162,060

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Solution

The fourth proportional to 289,413.60, 399,368.88 and 162,060 is: 223,630.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,413.60 : 399,368.88 = 162,060 : x
  2. Step 2: Convert to fraction form
    289,413.60/399,368.88 = 162,060/x
  3. Step 3: Cross multiply
    289,413.60x = 399,368.88 × 162,060
  4. Step 4: Simplify right side
    289,413.60x = 64,721,720,692.80
  5. Step 5: Solve for x
    x = 64,721,720,692.80/289,413.60
  6. Step 6: Final answer
    x = 223,630.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.