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Finding the Fourth Proportional to 638,608.40, 956,875.80 and 401,526.80

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Solution

The fourth proportional to 638,608.40, 956,875.80 and 401,526.80 is: 601,638.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,608.40 : 956,875.80 = 401,526.80 : x
  2. Step 2: Convert to fraction form
    638,608.40/956,875.80 = 401,526.80/x
  3. Step 3: Cross multiply
    638,608.40x = 956,875.80 × 401,526.80
  4. Step 4: Simplify right side
    638,608.40x = 384,211,277,971.44
  5. Step 5: Solve for x
    x = 384,211,277,971.44/638,608.40
  6. Step 6: Final answer
    x = 601,638.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.