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Finding the Fourth Proportional to 663,333.40, 915,403.20 and 376,869.22

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Solution

The fourth proportional to 663,333.40, 915,403.20 and 376,869.22 is: 520,081.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,333.40 : 915,403.20 = 376,869.22 : x
  2. Step 2: Convert to fraction form
    663,333.40/915,403.20 = 376,869.22/x
  3. Step 3: Cross multiply
    663,333.40x = 915,403.20 × 376,869.22
  4. Step 4: Simplify right side
    663,333.40x = 344,987,289,969.50
  5. Step 5: Solve for x
    x = 344,987,289,969.50/663,333.40
  6. Step 6: Final answer
    x = 520,081.29

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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.