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Finding the Fourth Proportional to 663,340.34, 915,434.14 and 376,908.94

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Solution

The fourth proportional to 663,340.34, 915,434.14 and 376,908.94 is: 520,148.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,340.34 : 915,434.14 = 376,908.94 : x
  2. Step 2: Convert to fraction form
    663,340.34/915,434.14 = 376,908.94/x
  3. Step 3: Cross multiply
    663,340.34x = 915,434.14 × 376,908.94
  4. Step 4: Simplify right side
    663,340.34x = 345,035,311,347.21
  5. Step 5: Solve for x
    x = 345,035,311,347.21/663,340.34
  6. Step 6: Final answer
    x = 520,148.24

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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.