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Finding the Fourth Proportional to 346,716.40, 520,074.60 and 287,618.80

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Solution

The fourth proportional to 346,716.40, 520,074.60 and 287,618.80 is: 431,428.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,716.40 : 520,074.60 = 287,618.80 : x
  2. Step 2: Convert to fraction form
    346,716.40/520,074.60 = 287,618.80/x
  3. Step 3: Cross multiply
    346,716.40x = 520,074.60 × 287,618.80
  4. Step 4: Simplify right side
    346,716.40x = 149,583,232,362.48
  5. Step 5: Solve for x
    x = 149,583,232,362.48/346,716.40
  6. Step 6: Final answer
    x = 431,428.20

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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.