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Finding the Fourth Proportional to 644,708.90, 889,494.57 and 386,532.74

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Solution

The fourth proportional to 644,708.90, 889,494.57 and 386,532.74 is: 533,293.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,708.90 : 889,494.57 = 386,532.74 : x
  2. Step 2: Convert to fraction form
    644,708.90/889,494.57 = 386,532.74/x
  3. Step 3: Cross multiply
    644,708.90x = 889,494.57 × 386,532.74
  4. Step 4: Simplify right side
    644,708.90x = 343,818,773,357.22
  5. Step 5: Solve for x
    x = 343,818,773,357.22/644,708.90
  6. Step 6: Final answer
    x = 533,293.05

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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.