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Finding the Fourth Proportional to 388,872.32, 536,699.40 and 219,122.24

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Solution

The fourth proportional to 388,872.32, 536,699.40 and 219,122.24 is: 302,420.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,872.32 : 536,699.40 = 219,122.24 : x
  2. Step 2: Convert to fraction form
    388,872.32/536,699.40 = 219,122.24/x
  3. Step 3: Cross multiply
    388,872.32x = 536,699.40 × 219,122.24
  4. Step 4: Simplify right side
    388,872.32x = 117,602,774,734.66
  5. Step 5: Solve for x
    x = 117,602,774,734.66/388,872.32
  6. Step 6: Final answer
    x = 302,420.02

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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.