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Finding the Fourth Proportional to 621,804.80, 858,065.28 and 367,238.40

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Solution

The fourth proportional to 621,804.80, 858,065.28 and 367,238.40 is: 506,774.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,804.80 : 858,065.28 = 367,238.40 : x
  2. Step 2: Convert to fraction form
    621,804.80/858,065.28 = 367,238.40/x
  3. Step 3: Cross multiply
    621,804.80x = 858,065.28 × 367,238.40
  4. Step 4: Simplify right side
    621,804.80x = 315,114,520,522.75
  5. Step 5: Solve for x
    x = 315,114,520,522.75/621,804.80
  6. Step 6: Final answer
    x = 506,774.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.