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Finding the Fourth Proportional to 772,269.80, 1,158,404.70 and 520,327.40

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Solution

The fourth proportional to 772,269.80, 1,158,404.70 and 520,327.40 is: 780,491.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,269.80 : 1,158,404.70 = 520,327.40 : x
  2. Step 2: Convert to fraction form
    772,269.80/1,158,404.70 = 520,327.40/x
  3. Step 3: Cross multiply
    772,269.80x = 1,158,404.70 × 520,327.40
  4. Step 4: Simplify right side
    772,269.80x = 602,749,705,698.78
  5. Step 5: Solve for x
    x = 602,749,705,698.78/772,269.80
  6. Step 6: Final answer
    x = 780,491.10

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Double scale
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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.