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Finding the Fourth Proportional to 553,042.76, 763,200.63 and 311,329.04

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Solution

The fourth proportional to 553,042.76, 763,200.63 and 311,329.04 is: 429,634.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,042.76 : 763,200.63 = 311,329.04 : x
  2. Step 2: Convert to fraction form
    553,042.76/763,200.63 = 311,329.04/x
  3. Step 3: Cross multiply
    553,042.76x = 763,200.63 × 311,329.04
  4. Step 4: Simplify right side
    553,042.76x = 237,606,515,649.29
  5. Step 5: Solve for x
    x = 237,606,515,649.29/553,042.76
  6. Step 6: Final answer
    x = 429,634.98

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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.