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Finding the Fourth Proportional to 265,528.40, 399,070.20 and 260,862.80

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Solution

The fourth proportional to 265,528.40, 399,070.20 and 260,862.80 is: 392,058.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,528.40 : 399,070.20 = 260,862.80 : x
  2. Step 2: Convert to fraction form
    265,528.40/399,070.20 = 260,862.80/x
  3. Step 3: Cross multiply
    265,528.40x = 399,070.20 × 260,862.80
  4. Step 4: Simplify right side
    265,528.40x = 104,102,569,768.56
  5. Step 5: Solve for x
    x = 104,102,569,768.56/265,528.40
  6. Step 6: Final answer
    x = 392,058.14

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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.