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Finding the Fourth Proportional to 282,812.22, 390,270.89 and 155,486.84

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Solution

The fourth proportional to 282,812.22, 390,270.89 and 155,486.84 is: 214,566.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,812.22 : 390,270.89 = 155,486.84 : x
  2. Step 2: Convert to fraction form
    282,812.22/390,270.89 = 155,486.84/x
  3. Step 3: Cross multiply
    282,812.22x = 390,270.89 × 155,486.84
  4. Step 4: Simplify right side
    282,812.22x = 60,681,985,867.45
  5. Step 5: Solve for x
    x = 60,681,985,867.45/282,812.22
  6. Step 6: Final answer
    x = 214,566.35

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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.