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Finding the Fourth Proportional to 397,401.87, 549,858.69 and 346,520.70

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Solution

The fourth proportional to 397,401.87, 549,858.69 and 346,520.70 is: 479,457.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,401.87 : 549,858.69 = 346,520.70 : x
  2. Step 2: Convert to fraction form
    397,401.87/549,858.69 = 346,520.70/x
  3. Step 3: Cross multiply
    397,401.87x = 549,858.69 × 346,520.70
  4. Step 4: Simplify right side
    397,401.87x = 190,537,418,159.88
  5. Step 5: Solve for x
    x = 190,537,418,159.88/397,401.87
  6. Step 6: Final answer
    x = 479,457.78

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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.