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Finding the Fourth Proportional to 553,495.58, 763,825.30 and 320,967.60

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Solution

The fourth proportional to 553,495.58, 763,825.30 and 320,967.60 is: 442,936.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,495.58 : 763,825.30 = 320,967.60 : x
  2. Step 2: Convert to fraction form
    553,495.58/763,825.30 = 320,967.60/x
  3. Step 3: Cross multiply
    553,495.58x = 763,825.30 × 320,967.60
  4. Step 4: Simplify right side
    553,495.58x = 245,163,173,360.28
  5. Step 5: Solve for x
    x = 245,163,173,360.28/553,495.58
  6. Step 6: Final answer
    x = 442,936.10

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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.