Home / 382,705.40-528,113.77-210,639.70

Finding the Fourth Proportional to 382,705.40, 528,113.77 and 210,639.70

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Solution

The fourth proportional to 382,705.40, 528,113.77 and 210,639.70 is: 290,671.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,705.40 : 528,113.77 = 210,639.70 : x
  2. Step 2: Convert to fraction form
    382,705.40/528,113.77 = 210,639.70/x
  3. Step 3: Cross multiply
    382,705.40x = 528,113.77 × 210,639.70
  4. Step 4: Simplify right side
    382,705.40x = 111,241,722,384.90
  5. Step 5: Solve for x
    x = 111,241,722,384.90/382,705.40
  6. Step 6: Final answer
    x = 290,671.95

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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.