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Finding the Fourth Proportional to 555,458.20, 766,528.50 and 300,803.56

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Solution

The fourth proportional to 555,458.20, 766,528.50 and 300,803.56 is: 415,106.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,458.20 : 766,528.50 = 300,803.56 : x
  2. Step 2: Convert to fraction form
    555,458.20/766,528.50 = 300,803.56/x
  3. Step 3: Cross multiply
    555,458.20x = 766,528.50 × 300,803.56
  4. Step 4: Simplify right side
    555,458.20x = 230,574,501,641.46
  5. Step 5: Solve for x
    x = 230,574,501,641.46/555,458.20
  6. Step 6: Final answer
    x = 415,106.85

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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.