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Finding the Fourth Proportional to 385,411.40, 578,117.10 and 367,915.40

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Solution

The fourth proportional to 385,411.40, 578,117.10 and 367,915.40 is: 551,873.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,411.40 : 578,117.10 = 367,915.40 : x
  2. Step 2: Convert to fraction form
    385,411.40/578,117.10 = 367,915.40/x
  3. Step 3: Cross multiply
    385,411.40x = 578,117.10 × 367,915.40
  4. Step 4: Simplify right side
    385,411.40x = 212,698,184,093.34
  5. Step 5: Solve for x
    x = 212,698,184,093.34/385,411.40
  6. Step 6: Final answer
    x = 551,873.10

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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.