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Finding the Fourth Proportional to 611,573.10, 917,359.65 and 358,974.60

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Solution

The fourth proportional to 611,573.10, 917,359.65 and 358,974.60 is: 538,461.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,573.10 : 917,359.65 = 358,974.60 : x
  2. Step 2: Convert to fraction form
    611,573.10/917,359.65 = 358,974.60/x
  3. Step 3: Cross multiply
    611,573.10x = 917,359.65 × 358,974.60
  4. Step 4: Simplify right side
    611,573.10x = 329,308,813,414.89
  5. Step 5: Solve for x
    x = 329,308,813,414.89/611,573.10
  6. Step 6: Final answer
    x = 538,461.90

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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.