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Finding the Fourth Proportional to 389,862.40, 585,139.20 and 333,875.20

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Solution

The fourth proportional to 389,862.40, 585,139.20 and 333,875.20 is: 501,108.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,862.40 : 585,139.20 = 333,875.20 : x
  2. Step 2: Convert to fraction form
    389,862.40/585,139.20 = 333,875.20/x
  3. Step 3: Cross multiply
    389,862.40x = 585,139.20 × 333,875.20
  4. Step 4: Simplify right side
    389,862.40x = 195,363,467,427.84
  5. Step 5: Solve for x
    x = 195,363,467,427.84/389,862.40
  6. Step 6: Final answer
    x = 501,108.77

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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.