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Finding the Fourth Proportional to 540,020.40, 808,864.20 and 290,410.80

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Solution

The fourth proportional to 540,020.40, 808,864.20 and 290,410.80 is: 434,988.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,020.40 : 808,864.20 = 290,410.80 : x
  2. Step 2: Convert to fraction form
    540,020.40/808,864.20 = 290,410.80/x
  3. Step 3: Cross multiply
    540,020.40x = 808,864.20 × 290,410.80
  4. Step 4: Simplify right side
    540,020.40x = 234,902,899,413.36
  5. Step 5: Solve for x
    x = 234,902,899,413.36/540,020.40
  6. Step 6: Final answer
    x = 434,988.94

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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.