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Finding the Fourth Proportional to 388,431.01, 536,085.89 and 218,698.21

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Solution

The fourth proportional to 388,431.01, 536,085.89 and 218,698.21 is: 301,832.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,431.01 : 536,085.89 = 218,698.21 : x
  2. Step 2: Convert to fraction form
    388,431.01/536,085.89 = 218,698.21/x
  3. Step 3: Cross multiply
    388,431.01x = 536,085.89 × 218,698.21
  4. Step 4: Simplify right side
    388,431.01x = 117,241,024,549.26
  5. Step 5: Solve for x
    x = 117,241,024,549.26/388,431.01
  6. Step 6: Final answer
    x = 301,832.30

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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.