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Finding the Fourth Proportional to 520,095.15, 780,145.16 and 220,500.45

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Solution

The fourth proportional to 520,095.15, 780,145.16 and 220,500.45 is: 330,751.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,095.15 : 780,145.16 = 220,500.45 : x
  2. Step 2: Convert to fraction form
    520,095.15/780,145.16 = 220,500.45/x
  3. Step 3: Cross multiply
    520,095.15x = 780,145.16 × 220,500.45
  4. Step 4: Simplify right side
    520,095.15x = 172,022,357,742.82
  5. Step 5: Solve for x
    x = 172,022,357,742.82/520,095.15
  6. Step 6: Final answer
    x = 330,751.71

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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.