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Finding the Fourth Proportional to 613,780.80, 918,079.20 and 551,054.40

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Solution

The fourth proportional to 613,780.80, 918,079.20 and 551,054.40 is: 824,254.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,780.80 : 918,079.20 = 551,054.40 : x
  2. Step 2: Convert to fraction form
    613,780.80/918,079.20 = 551,054.40/x
  3. Step 3: Cross multiply
    613,780.80x = 918,079.20 × 551,054.40
  4. Step 4: Simplify right side
    613,780.80x = 505,911,582,708.48
  5. Step 5: Solve for x
    x = 505,911,582,708.48/613,780.80
  6. Step 6: Final answer
    x = 824,254.49

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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.