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Finding the Fourth Proportional to 645,480.16, 890,757.60 and 355,085.44

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Solution

The fourth proportional to 645,480.16, 890,757.60 and 355,085.44 is: 490,015.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,480.16 : 890,757.60 = 355,085.44 : x
  2. Step 2: Convert to fraction form
    645,480.16/890,757.60 = 355,085.44/x
  3. Step 3: Cross multiply
    645,480.16x = 890,757.60 × 355,085.44
  4. Step 4: Simplify right side
    645,480.16x = 316,295,054,329.34
  5. Step 5: Solve for x
    x = 316,295,054,329.34/645,480.16
  6. Step 6: Final answer
    x = 490,015.15

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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.