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Finding the Fourth Proportional to 663,269.18, 915,302.70 and 368,916.90

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Solution

The fourth proportional to 663,269.18, 915,302.70 and 368,916.90 is: 509,100.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,269.18 : 915,302.70 = 368,916.90 : x
  2. Step 2: Convert to fraction form
    663,269.18/915,302.70 = 368,916.90/x
  3. Step 3: Cross multiply
    663,269.18x = 915,302.70 × 368,916.90
  4. Step 4: Simplify right side
    663,269.18x = 337,670,638,936.11
  5. Step 5: Solve for x
    x = 337,670,638,936.11/663,269.18
  6. Step 6: Final answer
    x = 509,100.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.