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Finding the Fourth Proportional to 554,630.11, 829,756.22 and 420,081.77

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Solution

The fourth proportional to 554,630.11, 829,756.22 and 420,081.77 is: 628,464.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,630.11 : 829,756.22 = 420,081.77 : x
  2. Step 2: Convert to fraction form
    554,630.11/829,756.22 = 420,081.77/x
  3. Step 3: Cross multiply
    554,630.11x = 829,756.22 × 420,081.77
  4. Step 4: Simplify right side
    554,630.11x = 348,565,455,316.92
  5. Step 5: Solve for x
    x = 348,565,455,316.92/554,630.11
  6. Step 6: Final answer
    x = 628,464.72

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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.