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Finding the Fourth Proportional to 579,021.40, 866,688.90 and 413,133.40

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Solution

The fourth proportional to 579,021.40, 866,688.90 and 413,133.40 is: 618,384.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,021.40 : 866,688.90 = 413,133.40 : x
  2. Step 2: Convert to fraction form
    579,021.40/866,688.90 = 413,133.40/x
  3. Step 3: Cross multiply
    579,021.40x = 866,688.90 × 413,133.40
  4. Step 4: Simplify right side
    579,021.40x = 358,058,131,999.26
  5. Step 5: Solve for x
    x = 358,058,131,999.26/579,021.40
  6. Step 6: Final answer
    x = 618,384.97

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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.