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Finding the Fourth Proportional to 553,042.79, 763,213.39 and 311,334.13

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Solution

The fourth proportional to 553,042.79, 763,213.39 and 311,334.13 is: 429,649.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,042.79 : 763,213.39 = 311,334.13 : x
  2. Step 2: Convert to fraction form
    553,042.79/763,213.39 = 311,334.13/x
  3. Step 3: Cross multiply
    553,042.79x = 763,213.39 × 311,334.13
  4. Step 4: Simplify right side
    553,042.79x = 237,614,376,955.68
  5. Step 5: Solve for x
    x = 237,614,376,955.68/553,042.79
  6. Step 6: Final answer
    x = 429,649.17

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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.