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Finding the Fourth Proportional to 282,990.80, 390,525.12 and 155,663.60

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Solution

The fourth proportional to 282,990.80, 390,525.12 and 155,663.60 is: 214,814.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,990.80 : 390,525.12 = 155,663.60 : x
  2. Step 2: Convert to fraction form
    282,990.80/390,525.12 = 155,663.60/x
  3. Step 3: Cross multiply
    282,990.80x = 390,525.12 × 155,663.60
  4. Step 4: Simplify right side
    282,990.80x = 60,790,546,069.63
  5. Step 5: Solve for x
    x = 60,790,546,069.63/282,990.80
  6. Step 6: Final answer
    x = 214,814.57

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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.