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Finding the Fourth Proportional to 355,015.20, 489,643.20 and 227,702.40

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Solution

The fourth proportional to 355,015.20, 489,643.20 and 227,702.40 is: 314,051.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,015.20 : 489,643.20 = 227,702.40 : x
  2. Step 2: Convert to fraction form
    355,015.20/489,643.20 = 227,702.40/x
  3. Step 3: Cross multiply
    355,015.20x = 489,643.20 × 227,702.40
  4. Step 4: Simplify right side
    355,015.20x = 111,492,931,783.68
  5. Step 5: Solve for x
    x = 111,492,931,783.68/355,015.20
  6. Step 6: Final answer
    x = 314,051.15

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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.