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Finding the Fourth Proportional to 388,912.10, 583,368.15 and 242,893.40

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Solution

The fourth proportional to 388,912.10, 583,368.15 and 242,893.40 is: 364,340.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,912.10 : 583,368.15 = 242,893.40 : x
  2. Step 2: Convert to fraction form
    388,912.10/583,368.15 = 242,893.40/x
  3. Step 3: Cross multiply
    388,912.10x = 583,368.15 × 242,893.40
  4. Step 4: Simplify right side
    388,912.10x = 141,696,273,405.21
  5. Step 5: Solve for x
    x = 141,696,273,405.21/388,912.10
  6. Step 6: Final answer
    x = 364,340.10

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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.