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Finding the Fourth Proportional to 372,679.20, 559,018.80 and 367,430.40

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Solution

The fourth proportional to 372,679.20, 559,018.80 and 367,430.40 is: 551,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,679.20 : 559,018.80 = 367,430.40 : x
  2. Step 2: Convert to fraction form
    372,679.20/559,018.80 = 367,430.40/x
  3. Step 3: Cross multiply
    372,679.20x = 559,018.80 × 367,430.40
  4. Step 4: Simplify right side
    372,679.20x = 205,400,501,291.52
  5. Step 5: Solve for x
    x = 205,400,501,291.52/372,679.20
  6. Step 6: Final answer
    x = 551,145.60

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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.