Home / 280,612.20-387,230.30-153,263.18

Finding the Fourth Proportional to 280,612.20, 387,230.30 and 153,263.18

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Solution

The fourth proportional to 280,612.20, 387,230.30 and 153,263.18 is: 211,495.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,612.20 : 387,230.30 = 153,263.18 : x
  2. Step 2: Convert to fraction form
    280,612.20/387,230.30 = 153,263.18/x
  3. Step 3: Cross multiply
    280,612.20x = 387,230.30 × 153,263.18
  4. Step 4: Simplify right side
    280,612.20x = 59,348,147,170.35
  5. Step 5: Solve for x
    x = 59,348,147,170.35/280,612.20
  6. Step 6: Final answer
    x = 211,495.25

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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.