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Finding the Fourth Proportional to 260,017.40, 390,026.10 and 214,916.60

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Solution

The fourth proportional to 260,017.40, 390,026.10 and 214,916.60 is: 322,374.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,017.40 : 390,026.10 = 214,916.60 : x
  2. Step 2: Convert to fraction form
    260,017.40/390,026.10 = 214,916.60/x
  3. Step 3: Cross multiply
    260,017.40x = 390,026.10 × 214,916.60
  4. Step 4: Simplify right side
    260,017.40x = 83,823,083,323.26
  5. Step 5: Solve for x
    x = 83,823,083,323.26/260,017.40
  6. Step 6: Final answer
    x = 322,374.90

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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.