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Finding the Fourth Proportional to 368,487.60, 551,419.20 and 255,638.40

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Solution

The fourth proportional to 368,487.60, 551,419.20 and 255,638.40 is: 382,547.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,487.60 : 551,419.20 = 255,638.40 : x
  2. Step 2: Convert to fraction form
    368,487.60/551,419.20 = 255,638.40/x
  3. Step 3: Cross multiply
    368,487.60x = 551,419.20 × 255,638.40
  4. Step 4: Simplify right side
    368,487.60x = 140,963,922,017.28
  5. Step 5: Solve for x
    x = 140,963,922,017.28/368,487.60
  6. Step 6: Final answer
    x = 382,547.26

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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.