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Finding the Fourth Proportional to 524,893.20, 787,339.80 and 209,576.40

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Solution

The fourth proportional to 524,893.20, 787,339.80 and 209,576.40 is: 314,364.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    524,893.20 : 787,339.80 = 209,576.40 : x
  2. Step 2: Convert to fraction form
    524,893.20/787,339.80 = 209,576.40/x
  3. Step 3: Cross multiply
    524,893.20x = 787,339.80 × 209,576.40
  4. Step 4: Simplify right side
    524,893.20x = 165,007,840,860.72
  5. Step 5: Solve for x
    x = 165,007,840,860.72/524,893.20
  6. Step 6: Final answer
    x = 314,364.60

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Double scale
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Similar ratio
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1.5x scale

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.