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Finding the Fourth Proportional to 280,604.90, 387,220.32 and 153,255.89

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Solution

The fourth proportional to 280,604.90, 387,220.32 and 153,255.89 is: 211,485.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,604.90 : 387,220.32 = 153,255.89 : x
  2. Step 2: Convert to fraction form
    280,604.90/387,220.32 = 153,255.89/x
  3. Step 3: Cross multiply
    280,604.90x = 387,220.32 × 153,255.89
  4. Step 4: Simplify right side
    280,604.90x = 59,343,795,735.74
  5. Step 5: Solve for x
    x = 59,343,795,735.74/280,604.90
  6. Step 6: Final answer
    x = 211,485.24

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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.