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Finding the Fourth Proportional to 608,523.71, 838,999.28 and 390,347.71

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Solution

The fourth proportional to 608,523.71, 838,999.28 and 390,347.71 is: 538,190.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,523.71 : 838,999.28 = 390,347.71 : x
  2. Step 2: Convert to fraction form
    608,523.71/838,999.28 = 390,347.71/x
  3. Step 3: Cross multiply
    608,523.71x = 838,999.28 × 390,347.71
  4. Step 4: Simplify right side
    608,523.71x = 327,501,446,518.02
  5. Step 5: Solve for x
    x = 327,501,446,518.02/608,523.71
  6. Step 6: Final answer
    x = 538,190.12

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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.