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Finding the Fourth Proportional to 282,906.60, 390,403.28 and 155,582.20

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Solution

The fourth proportional to 282,906.60, 390,403.28 and 155,582.20 is: 214,699.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,906.60 : 390,403.28 = 155,582.20 : x
  2. Step 2: Convert to fraction form
    282,906.60/390,403.28 = 155,582.20/x
  3. Step 3: Cross multiply
    282,906.60x = 390,403.28 × 155,582.20
  4. Step 4: Simplify right side
    282,906.60x = 60,739,801,189.62
  5. Step 5: Solve for x
    x = 60,739,801,189.62/282,906.60
  6. Step 6: Final answer
    x = 214,699.13

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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.