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Finding the Fourth Proportional to 282,712.08, 390,149.88 and 155,390.88

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Solution

The fourth proportional to 282,712.08, 390,149.88 and 155,390.88 is: 214,443.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,712.08 : 390,149.88 = 155,390.88 : x
  2. Step 2: Convert to fraction form
    282,712.08/390,149.88 = 155,390.88/x
  3. Step 3: Cross multiply
    282,712.08x = 390,149.88 × 155,390.88
  4. Step 4: Simplify right side
    282,712.08x = 60,625,733,185.09
  5. Step 5: Solve for x
    x = 60,625,733,185.09/282,712.08
  6. Step 6: Final answer
    x = 214,443.38

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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.