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Finding the Fourth Proportional to 282,774.72, 390,245.76 and 155,449.92

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Solution

The fourth proportional to 282,774.72, 390,245.76 and 155,449.92 is: 214,530.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,774.72 : 390,245.76 = 155,449.92 : x
  2. Step 2: Convert to fraction form
    282,774.72/390,245.76 = 155,449.92/x
  3. Step 3: Cross multiply
    282,774.72x = 390,245.76 × 155,449.92
  4. Step 4: Simplify right side
    282,774.72x = 60,663,672,172.34
  5. Step 5: Solve for x
    x = 60,663,672,172.34/282,774.72
  6. Step 6: Final answer
    x = 214,530.04

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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.