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Finding the Fourth Proportional to 520,758.71, 718,618.12 and 291,271.67

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Solution

The fourth proportional to 520,758.71, 718,618.12 and 291,271.67 is: 401,938.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,758.71 : 718,618.12 = 291,271.67 : x
  2. Step 2: Convert to fraction form
    520,758.71/718,618.12 = 291,271.67/x
  3. Step 3: Cross multiply
    520,758.71x = 718,618.12 × 291,271.67
  4. Step 4: Simplify right side
    520,758.71x = 209,313,097,969.13
  5. Step 5: Solve for x
    x = 209,313,097,969.13/520,758.71
  6. Step 6: Final answer
    x = 401,938.73

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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.