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Finding the Fourth Proportional to 282,858.52, 390,354.80 and 155,543.80

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Solution

The fourth proportional to 282,858.52, 390,354.80 and 155,543.80 is: 214,655.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,858.52 : 390,354.80 = 155,543.80 : x
  2. Step 2: Convert to fraction form
    282,858.52/390,354.80 = 155,543.80/x
  3. Step 3: Cross multiply
    282,858.52x = 390,354.80 × 155,543.80
  4. Step 4: Simplify right side
    282,858.52x = 60,717,268,940.24
  5. Step 5: Solve for x
    x = 60,717,268,940.24/282,858.52
  6. Step 6: Final answer
    x = 214,655.97

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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.