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Finding the Fourth Proportional to 380,684.80, 525,366.30 and 217,389.52

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Solution

The fourth proportional to 380,684.80, 525,366.30 and 217,389.52 is: 300,009.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,684.80 : 525,366.30 = 217,389.52 : x
  2. Step 2: Convert to fraction form
    380,684.80/525,366.30 = 217,389.52/x
  3. Step 3: Cross multiply
    380,684.80x = 525,366.30 × 217,389.52
  4. Step 4: Simplify right side
    380,684.80x = 114,209,127,781.18
  5. Step 5: Solve for x
    x = 114,209,127,781.18/380,684.80
  6. Step 6: Final answer
    x = 300,009.69

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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.