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Finding the Fourth Proportional to 554,440.95, 765,139.82 and 312,677.19

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Solution

The fourth proportional to 554,440.95, 765,139.82 and 312,677.19 is: 431,500.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,440.95 : 765,139.82 = 312,677.19 : x
  2. Step 2: Convert to fraction form
    554,440.95/765,139.82 = 312,677.19/x
  3. Step 3: Cross multiply
    554,440.95x = 765,139.82 × 312,677.19
  4. Step 4: Simplify right side
    554,440.95x = 239,241,767,311.32
  5. Step 5: Solve for x
    x = 239,241,767,311.32/554,440.95
  6. Step 6: Final answer
    x = 431,500.90

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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.