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Finding the Fourth Proportional to 380,951.45, 525,718.93 and 208,885.13

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Solution

The fourth proportional to 380,951.45, 525,718.93 and 208,885.13 is: 288,264.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,951.45 : 525,718.93 = 208,885.13 : x
  2. Step 2: Convert to fraction form
    380,951.45/525,718.93 = 208,885.13/x
  3. Step 3: Cross multiply
    380,951.45x = 525,718.93 × 208,885.13
  4. Step 4: Simplify right side
    380,951.45x = 109,814,867,036.51
  5. Step 5: Solve for x
    x = 109,814,867,036.51/380,951.45
  6. Step 6: Final answer
    x = 288,264.73

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1.5x scale

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.