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Finding the Fourth Proportional to 520,742.94, 718,591.35 and 291,260.46

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Solution

The fourth proportional to 520,742.94, 718,591.35 and 291,260.46 is: 401,920.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,742.94 : 718,591.35 = 291,260.46 : x
  2. Step 2: Convert to fraction form
    520,742.94/718,591.35 = 291,260.46/x
  3. Step 3: Cross multiply
    520,742.94x = 718,591.35 × 291,260.46
  4. Step 4: Simplify right side
    520,742.94x = 209,297,247,153.02
  5. Step 5: Solve for x
    x = 209,297,247,153.02/520,742.94
  6. Step 6: Final answer
    x = 401,920.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.