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Finding the Fourth Proportional to 282,735.60, 390,176.42 and 155,419.40

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Solution

The fourth proportional to 282,735.60, 390,176.42 and 155,419.40 is: 214,479.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,735.60 : 390,176.42 = 155,419.40 : x
  2. Step 2: Convert to fraction form
    282,735.60/390,176.42 = 155,419.40/x
  3. Step 3: Cross multiply
    282,735.60x = 390,176.42 × 155,419.40
  4. Step 4: Simplify right side
    282,735.60x = 60,640,982,362.57
  5. Step 5: Solve for x
    x = 60,640,982,362.57/282,735.60
  6. Step 6: Final answer
    x = 214,479.47

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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.