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Finding the Fourth Proportional to 571,297.19, 788,641.25 and 399,888.33

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Solution

The fourth proportional to 571,297.19, 788,641.25 and 399,888.33 is: 552,021.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,297.19 : 788,641.25 = 399,888.33 : x
  2. Step 2: Convert to fraction form
    571,297.19/788,641.25 = 399,888.33/x
  3. Step 3: Cross multiply
    571,297.19x = 788,641.25 × 399,888.33
  4. Step 4: Simplify right side
    571,297.19x = 315,368,430,432.17
  5. Step 5: Solve for x
    x = 315,368,430,432.17/571,297.19
  6. Step 6: Final answer
    x = 552,021.68

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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.