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Finding the Fourth Proportional to 520,199.80, 779,424.90 and 342,615.40

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Solution

The fourth proportional to 520,199.80, 779,424.90 and 342,615.40 is: 513,346.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,199.80 : 779,424.90 = 342,615.40 : x
  2. Step 2: Convert to fraction form
    520,199.80/779,424.90 = 342,615.40/x
  3. Step 3: Cross multiply
    520,199.80x = 779,424.90 × 342,615.40
  4. Step 4: Simplify right side
    520,199.80x = 267,042,973,883.46
  5. Step 5: Solve for x
    x = 267,042,973,883.46/520,199.80
  6. Step 6: Final answer
    x = 513,346.94

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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.