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Finding the Fourth Proportional to 613,740.80, 918,019.20 and 551,014.40

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Solution

The fourth proportional to 613,740.80, 918,019.20 and 551,014.40 is: 824,194.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,740.80 : 918,019.20 = 551,014.40 : x
  2. Step 2: Convert to fraction form
    613,740.80/918,019.20 = 551,014.40/x
  3. Step 3: Cross multiply
    613,740.80x = 918,019.20 × 551,014.40
  4. Step 4: Simplify right side
    613,740.80x = 505,841,798,676.48
  5. Step 5: Solve for x
    x = 505,841,798,676.48/613,740.80
  6. Step 6: Final answer
    x = 824,194.51

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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.