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Finding the Fourth Proportional to 358,957.40, 538,436.10 and 209,366.60

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Solution

The fourth proportional to 358,957.40, 538,436.10 and 209,366.60 is: 314,049.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,957.40 : 538,436.10 = 209,366.60 : x
  2. Step 2: Convert to fraction form
    358,957.40/538,436.10 = 209,366.60/x
  3. Step 3: Cross multiply
    358,957.40x = 538,436.10 × 209,366.60
  4. Step 4: Simplify right side
    358,957.40x = 112,730,535,574.26
  5. Step 5: Solve for x
    x = 112,730,535,574.26/358,957.40
  6. Step 6: Final answer
    x = 314,049.90

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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.