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Finding the Fourth Proportional to 358,610.40, 537,915.60 and 209,019.60

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Solution

The fourth proportional to 358,610.40, 537,915.60 and 209,019.60 is: 313,529.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,610.40 : 537,915.60 = 209,019.60 : x
  2. Step 2: Convert to fraction form
    358,610.40/537,915.60 = 209,019.60/x
  3. Step 3: Cross multiply
    358,610.40x = 537,915.60 × 209,019.60
  4. Step 4: Simplify right side
    358,610.40x = 112,434,903,545.76
  5. Step 5: Solve for x
    x = 112,434,903,545.76/358,610.40
  6. Step 6: Final answer
    x = 313,529.40

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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.