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Finding the Fourth Proportional to 399,401.80, 598,118.55 and 265,557.40

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Solution

The fourth proportional to 399,401.80, 598,118.55 and 265,557.40 is: 397,681.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,401.80 : 598,118.55 = 265,557.40 : x
  2. Step 2: Convert to fraction form
    399,401.80/598,118.55 = 265,557.40/x
  3. Step 3: Cross multiply
    399,401.80x = 598,118.55 × 265,557.40
  4. Step 4: Simplify right side
    399,401.80x = 158,834,807,029.77
  5. Step 5: Solve for x
    x = 158,834,807,029.77/399,401.80
  6. Step 6: Final answer
    x = 397,681.75

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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.