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Finding the Fourth Proportional to 543,339.80, 815,009.70 and 520,303.40

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Solution

The fourth proportional to 543,339.80, 815,009.70 and 520,303.40 is: 780,455.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,339.80 : 815,009.70 = 520,303.40 : x
  2. Step 2: Convert to fraction form
    543,339.80/815,009.70 = 520,303.40/x
  3. Step 3: Cross multiply
    543,339.80x = 815,009.70 × 520,303.40
  4. Step 4: Simplify right side
    543,339.80x = 424,052,317,942.98
  5. Step 5: Solve for x
    x = 424,052,317,942.98/543,339.80
  6. Step 6: Final answer
    x = 780,455.10

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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.