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Finding the Fourth Proportional to 461,139.70, 691,709.55 and 425,710.30

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Solution

The fourth proportional to 461,139.70, 691,709.55 and 425,710.30 is: 638,565.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,139.70 : 691,709.55 = 425,710.30 : x
  2. Step 2: Convert to fraction form
    461,139.70/691,709.55 = 425,710.30/x
  3. Step 3: Cross multiply
    461,139.70x = 691,709.55 × 425,710.30
  4. Step 4: Simplify right side
    461,139.70x = 294,467,880,043.37
  5. Step 5: Solve for x
    x = 294,467,880,043.37/461,139.70
  6. Step 6: Final answer
    x = 638,565.45

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Similar ratio
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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.