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Finding the Fourth Proportional to 520,763.44, 718,689.72 and 291,396.28

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Solution

The fourth proportional to 520,763.44, 718,689.72 and 291,396.28 is: 402,147.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,763.44 : 718,689.72 = 291,396.28 : x
  2. Step 2: Convert to fraction form
    520,763.44/718,689.72 = 291,396.28/x
  3. Step 3: Cross multiply
    520,763.44x = 718,689.72 × 291,396.28
  4. Step 4: Simplify right side
    520,763.44x = 209,423,510,882.24
  5. Step 5: Solve for x
    x = 209,423,510,882.24/520,763.44
  6. Step 6: Final answer
    x = 402,147.11

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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.