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Finding the Fourth Proportional to 520,106.30, 780,159.45 and 425,627.90

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Solution

The fourth proportional to 520,106.30, 780,159.45 and 425,627.90 is: 638,441.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,106.30 : 780,159.45 = 425,627.90 : x
  2. Step 2: Convert to fraction form
    520,106.30/780,159.45 = 425,627.90/x
  3. Step 3: Cross multiply
    520,106.30x = 780,159.45 × 425,627.90
  4. Step 4: Simplify right side
    520,106.30x = 332,057,628,368.66
  5. Step 5: Solve for x
    x = 332,057,628,368.66/520,106.30
  6. Step 6: Final answer
    x = 638,441.85

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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.