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Finding the Fourth Proportional to 1,382,402, 2,073,721.80 and 385,130

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Solution

The fourth proportional to 1,382,402, 2,073,721.80 and 385,130 is: 577,728.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382,402 : 2,073,721.80 = 385,130 : x
  2. Step 2: Convert to fraction form
    1,382,402/2,073,721.80 = 385,130/x
  3. Step 3: Cross multiply
    1,382,402x = 2,073,721.80 × 385,130
  4. Step 4: Simplify right side
    1,382,402x = 798,652,476,834
  5. Step 5: Solve for x
    x = 798,652,476,834/1,382,402
  6. Step 6: Final answer
    x = 577,728.10

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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.