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Finding the Fourth Proportional to 638,669.76, 881,352 and 352,216.32

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Solution

The fourth proportional to 638,669.76, 881,352 and 352,216.32 is: 486,051.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,669.76 : 881,352 = 352,216.32 : x
  2. Step 2: Convert to fraction form
    638,669.76/881,352 = 352,216.32/x
  3. Step 3: Cross multiply
    638,669.76x = 881,352 × 352,216.32
  4. Step 4: Simplify right side
    638,669.76x = 310,426,558,064.64
  5. Step 5: Solve for x
    x = 310,426,558,064.64/638,669.76
  6. Step 6: Final answer
    x = 486,051.76

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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.