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Finding the Fourth Proportional to 385,540.80, 578,138.40 and 175,070.40

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Solution

The fourth proportional to 385,540.80, 578,138.40 and 175,070.40 is: 262,527.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,540.80 : 578,138.40 = 175,070.40 : x
  2. Step 2: Convert to fraction form
    385,540.80/578,138.40 = 175,070.40/x
  3. Step 3: Cross multiply
    385,540.80x = 578,138.40 × 175,070.40
  4. Step 4: Simplify right side
    385,540.80x = 101,214,920,943.36
  5. Step 5: Solve for x
    x = 101,214,920,943.36/385,540.80
  6. Step 6: Final answer
    x = 262,527.13

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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.