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Finding the Fourth Proportional to 346,715.90, 520,073.85 and 287,618.30

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Solution

The fourth proportional to 346,715.90, 520,073.85 and 287,618.30 is: 431,427.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,715.90 : 520,073.85 = 287,618.30 : x
  2. Step 2: Convert to fraction form
    346,715.90/520,073.85 = 287,618.30/x
  3. Step 3: Cross multiply
    346,715.90x = 520,073.85 × 287,618.30
  4. Step 4: Simplify right side
    346,715.90x = 149,582,756,611.46
  5. Step 5: Solve for x
    x = 149,582,756,611.46/346,715.90
  6. Step 6: Final answer
    x = 431,427.45

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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.