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Finding the Fourth Proportional to 555,638.92, 766,785.36 and 300,990.16

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Solution

The fourth proportional to 555,638.92, 766,785.36 and 300,990.16 is: 415,368.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,638.92 : 766,785.36 = 300,990.16 : x
  2. Step 2: Convert to fraction form
    555,638.92/766,785.36 = 300,990.16/x
  3. Step 3: Cross multiply
    555,638.92x = 766,785.36 × 300,990.16
  4. Step 4: Simplify right side
    555,638.92x = 230,794,848,192.06
  5. Step 5: Solve for x
    x = 230,794,848,192.06/555,638.92
  6. Step 6: Final answer
    x = 415,368.40

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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.