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Finding the Fourth Proportional to 555,387.24, 766,434.80 and 300,738.64

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Solution

The fourth proportional to 555,387.24, 766,434.80 and 300,738.64 is: 415,019.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,387.24 : 766,434.80 = 300,738.64 : x
  2. Step 2: Convert to fraction form
    555,387.24/766,434.80 = 300,738.64/x
  3. Step 3: Cross multiply
    555,387.24x = 766,434.80 × 300,738.64
  4. Step 4: Simplify right side
    555,387.24x = 230,496,559,400.67
  5. Step 5: Solve for x
    x = 230,496,559,400.67/555,387.24
  6. Step 6: Final answer
    x = 415,019.54

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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.