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Finding the Fourth Proportional to 520,031.20, 778,491.60 and 309,560.80

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Solution

The fourth proportional to 520,031.20, 778,491.60 and 309,560.80 is: 463,415.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,031.20 : 778,491.60 = 309,560.80 : x
  2. Step 2: Convert to fraction form
    520,031.20/778,491.60 = 309,560.80/x
  3. Step 3: Cross multiply
    520,031.20x = 778,491.60 × 309,560.80
  4. Step 4: Simplify right side
    520,031.20x = 240,990,482,489.28
  5. Step 5: Solve for x
    x = 240,990,482,489.28/520,031.20
  6. Step 6: Final answer
    x = 463,415.43

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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.