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Finding the Fourth Proportional to 388,693.87, 536,390.25 and 216,608.05

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Solution

The fourth proportional to 388,693.87, 536,390.25 and 216,608.05 is: 298,915.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,693.87 : 536,390.25 = 216,608.05 : x
  2. Step 2: Convert to fraction form
    388,693.87/536,390.25 = 216,608.05/x
  3. Step 3: Cross multiply
    388,693.87x = 536,390.25 × 216,608.05
  4. Step 4: Simplify right side
    388,693.87x = 116,186,446,091.51
  5. Step 5: Solve for x
    x = 116,186,446,091.51/388,693.87
  6. Step 6: Final answer
    x = 298,915.05

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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.