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Finding the Fourth Proportional to 387,047.20, 579,802.80 and 340,864.80

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Solution

The fourth proportional to 387,047.20, 579,802.80 and 340,864.80 is: 510,620.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,047.20 : 579,802.80 = 340,864.80 : x
  2. Step 2: Convert to fraction form
    387,047.20/579,802.80 = 340,864.80/x
  3. Step 3: Cross multiply
    387,047.20x = 579,802.80 × 340,864.80
  4. Step 4: Simplify right side
    387,047.20x = 197,634,365,461.44
  5. Step 5: Solve for x
    x = 197,634,365,461.44/387,047.20
  6. Step 6: Final answer
    x = 510,620.84

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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.