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Finding the Fourth Proportional to 520,071.20, 778,378.80 and 377,511.20

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Solution

The fourth proportional to 520,071.20, 778,378.80 and 377,511.20 is: 565,012.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,071.20 : 778,378.80 = 377,511.20 : x
  2. Step 2: Convert to fraction form
    520,071.20/778,378.80 = 377,511.20/x
  3. Step 3: Cross multiply
    520,071.20x = 778,378.80 × 377,511.20
  4. Step 4: Simplify right side
    520,071.20x = 293,846,714,842.56
  5. Step 5: Solve for x
    x = 293,846,714,842.56/520,071.20
  6. Step 6: Final answer
    x = 565,012.47

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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.