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Finding the Fourth Proportional to 571,299.18, 788,644 and 399,890.34

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Solution

The fourth proportional to 571,299.18, 788,644 and 399,890.34 is: 552,024.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,299.18 : 788,644 = 399,890.34 : x
  2. Step 2: Convert to fraction form
    571,299.18/788,644 = 399,890.34/x
  3. Step 3: Cross multiply
    571,299.18x = 788,644 × 399,890.34
  4. Step 4: Simplify right side
    571,299.18x = 315,371,117,298.96
  5. Step 5: Solve for x
    x = 315,371,117,298.96/571,299.18
  6. Step 6: Final answer
    x = 552,024.45

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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.