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Finding the Fourth Proportional to 555,417.45, 766,478.43 and 300,768.84

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Solution

The fourth proportional to 555,417.45, 766,478.43 and 300,768.84 is: 415,062.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,417.45 : 766,478.43 = 300,768.84 : x
  2. Step 2: Convert to fraction form
    555,417.45/766,478.43 = 300,768.84/x
  3. Step 3: Cross multiply
    555,417.45x = 766,478.43 × 300,768.84
  4. Step 4: Simplify right side
    555,417.45x = 230,532,828,276.12
  5. Step 5: Solve for x
    x = 230,532,828,276.12/555,417.45
  6. Step 6: Final answer
    x = 415,062.27

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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.