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Finding the Fourth Proportional to 520,445.80, 779,502.30 and 427,133.80

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Solution

The fourth proportional to 520,445.80, 779,502.30 and 427,133.80 is: 639,743.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,445.80 : 779,502.30 = 427,133.80 : x
  2. Step 2: Convert to fraction form
    520,445.80/779,502.30 = 427,133.80/x
  3. Step 3: Cross multiply
    520,445.80x = 779,502.30 × 427,133.80
  4. Step 4: Simplify right side
    520,445.80x = 332,951,779,507.74
  5. Step 5: Solve for x
    x = 332,951,779,507.74/520,445.80
  6. Step 6: Final answer
    x = 639,743.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.