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Finding the Fourth Proportional to 555,385.13, 766,430.16 and 300,736.32

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Solution

The fourth proportional to 555,385.13, 766,430.16 and 300,736.32 is: 415,015.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,385.13 : 766,430.16 = 300,736.32 : x
  2. Step 2: Convert to fraction form
    555,385.13/766,430.16 = 300,736.32/x
  3. Step 3: Cross multiply
    555,385.13x = 766,430.16 × 300,736.32
  4. Step 4: Simplify right side
    555,385.13x = 230,493,385,855.41
  5. Step 5: Solve for x
    x = 230,493,385,855.41/555,385.13
  6. Step 6: Final answer
    x = 415,015.41

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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.