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Finding the Fourth Proportional to 554,595.05, 765,376.16 and 312,789.39

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Solution

The fourth proportional to 554,595.05, 765,376.16 and 312,789.39 is: 431,669.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,595.05 : 765,376.16 = 312,789.39 : x
  2. Step 2: Convert to fraction form
    554,595.05/765,376.16 = 312,789.39/x
  3. Step 3: Cross multiply
    554,595.05x = 765,376.16 × 312,789.39
  4. Step 4: Simplify right side
    554,595.05x = 239,401,542,988.92
  5. Step 5: Solve for x
    x = 239,401,542,988.92/554,595.05
  6. Step 6: Final answer
    x = 431,669.10

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1.5x scale

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.