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Finding the Fourth Proportional to 280,612.96, 387,239.52 and 153,289.12

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Solution

The fourth proportional to 280,612.96, 387,239.52 and 153,289.12 is: 211,535.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,612.96 : 387,239.52 = 153,289.12 : x
  2. Step 2: Convert to fraction form
    280,612.96/387,239.52 = 153,289.12/x
  3. Step 3: Cross multiply
    280,612.96x = 387,239.52 × 153,289.12
  4. Step 4: Simplify right side
    280,612.96x = 59,359,605,250.02
  5. Step 5: Solve for x
    x = 59,359,605,250.02/280,612.96
  6. Step 6: Final answer
    x = 211,535.51

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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.