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Finding the Fourth Proportional to 290,413.20, 435,604.08 and 90,710.64

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Solution

The fourth proportional to 290,413.20, 435,604.08 and 90,710.64 is: 136,061.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,413.20 : 435,604.08 = 90,710.64 : x
  2. Step 2: Convert to fraction form
    290,413.20/435,604.08 = 90,710.64/x
  3. Step 3: Cross multiply
    290,413.20x = 435,604.08 × 90,710.64
  4. Step 4: Simplify right side
    290,413.20x = 39,513,924,883.41
  5. Step 5: Solve for x
    x = 39,513,924,883.41/290,413.20
  6. Step 6: Final answer
    x = 136,061.05

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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.