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Finding the Fourth Proportional to 553,415.46, 763,714.92 and 320,887.44

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Solution

The fourth proportional to 553,415.46, 763,714.92 and 320,887.44 is: 442,825.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,415.46 : 763,714.92 = 320,887.44 : x
  2. Step 2: Convert to fraction form
    553,415.46/763,714.92 = 320,887.44/x
  3. Step 3: Cross multiply
    553,415.46x = 763,714.92 × 320,887.44
  4. Step 4: Simplify right side
    553,415.46x = 245,066,525,568.61
  5. Step 5: Solve for x
    x = 245,066,525,568.61/553,415.46
  6. Step 6: Final answer
    x = 442,825.59

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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.