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Finding the Fourth Proportional to 1,385,586, 2,078,495.64 and 388,314

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Solution

The fourth proportional to 1,385,586, 2,078,495.64 and 388,314 is: 582,503.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,586 : 2,078,495.64 = 388,314 : x
  2. Step 2: Convert to fraction form
    1,385,586/2,078,495.64 = 388,314/x
  3. Step 3: Cross multiply
    1,385,586x = 2,078,495.64 × 388,314
  4. Step 4: Simplify right side
    1,385,586x = 807,108,955,950.96
  5. Step 5: Solve for x
    x = 807,108,955,950.96/1,385,586
  6. Step 6: Final answer
    x = 582,503.69

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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.