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Finding the Fourth Proportional to 418,311.40, 626,775.90 and 356,103.40

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Solution

The fourth proportional to 418,311.40, 626,775.90 and 356,103.40 is: 533,566.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,311.40 : 626,775.90 = 356,103.40 : x
  2. Step 2: Convert to fraction form
    418,311.40/626,775.90 = 356,103.40/x
  3. Step 3: Cross multiply
    418,311.40x = 626,775.90 × 356,103.40
  4. Step 4: Simplify right side
    418,311.40x = 223,197,029,028.06
  5. Step 5: Solve for x
    x = 223,197,029,028.06/418,311.40
  6. Step 6: Final answer
    x = 533,566.69

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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.