Home / 285,382,640.32-393,825,879.12-155,003,381.44

Finding the Fourth Proportional to 285,382,640.32, 393,825,879.12 and 155,003,381.44

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Solution

The fourth proportional to 285,382,640.32, 393,825,879.12 and 155,003,381.44 is: 213,903,490.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,382,640.32 : 393,825,879.12 = 155,003,381.44 : x
  2. Step 2: Convert to fraction form
    285,382,640.32/393,825,879.12 = 155,003,381.44/x
  3. Step 3: Cross multiply
    285,382,640.32x = 393,825,879.12 × 155,003,381.44
  4. Step 4: Simplify right side
    285,382,640.32x = 61,044,342,962,180,688
  5. Step 5: Solve for x
    x = 61,044,342,962,180,688/285,382,640.32
  6. Step 6: Final answer
    x = 213,903,490.74

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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.