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Finding the Fourth Proportional to 520,038.55, 778,891.42 and 426,726.55

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Solution

The fourth proportional to 520,038.55, 778,891.42 and 426,726.55 is: 639,132.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,038.55 : 778,891.42 = 426,726.55 : x
  2. Step 2: Convert to fraction form
    520,038.55/778,891.42 = 426,726.55/x
  3. Step 3: Cross multiply
    520,038.55x = 778,891.42 × 426,726.55
  4. Step 4: Simplify right side
    520,038.55x = 332,373,648,481.20
  5. Step 5: Solve for x
    x = 332,373,648,481.20/520,038.55
  6. Step 6: Final answer
    x = 639,132.71

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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.