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Finding the Fourth Proportional to 385,955.36, 579,820.32 and 272,364.80

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Solution

The fourth proportional to 385,955.36, 579,820.32 and 272,364.80 is: 409,173.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,955.36 : 579,820.32 = 272,364.80 : x
  2. Step 2: Convert to fraction form
    385,955.36/579,820.32 = 272,364.80/x
  3. Step 3: Cross multiply
    385,955.36x = 579,820.32 × 272,364.80
  4. Step 4: Simplify right side
    385,955.36x = 157,922,645,492.74
  5. Step 5: Solve for x
    x = 157,922,645,492.74/385,955.36
  6. Step 6: Final answer
    x = 409,173.34

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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.