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Finding the Fourth Proportional to 282,915.87, 390,416.10 and 155,591.57

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Solution

The fourth proportional to 282,915.87, 390,416.10 and 155,591.57 is: 214,712.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,915.87 : 390,416.10 = 155,591.57 : x
  2. Step 2: Convert to fraction form
    282,915.87/390,416.10 = 155,591.57/x
  3. Step 3: Cross multiply
    282,915.87x = 390,416.10 × 155,591.57
  4. Step 4: Simplify right side
    282,915.87x = 60,745,452,000.20
  5. Step 5: Solve for x
    x = 60,745,452,000.20/282,915.87
  6. Step 6: Final answer
    x = 214,712.07

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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.