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Finding the Fourth Proportional to 520,079.40, 780,378.30 and 295,612.20

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Solution

The fourth proportional to 520,079.40, 780,378.30 and 295,612.20 is: 443,565.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,079.40 : 780,378.30 = 295,612.20 : x
  2. Step 2: Convert to fraction form
    520,079.40/780,378.30 = 295,612.20/x
  3. Step 3: Cross multiply
    520,079.40x = 780,378.30 × 295,612.20
  4. Step 4: Simplify right side
    520,079.40x = 230,689,346,095.26
  5. Step 5: Solve for x
    x = 230,689,346,095.26/520,079.40
  6. Step 6: Final answer
    x = 443,565.63

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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.