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Finding the Fourth Proportional to 280,624.86, 387,244.08 and 153,300.42

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Solution

The fourth proportional to 280,624.86, 387,244.08 and 153,300.42 is: 211,544.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,624.86 : 387,244.08 = 153,300.42 : x
  2. Step 2: Convert to fraction form
    280,624.86/387,244.08 = 153,300.42/x
  3. Step 3: Cross multiply
    280,624.86x = 387,244.08 × 153,300.42
  4. Step 4: Simplify right side
    280,624.86x = 59,364,680,106.51
  5. Step 5: Solve for x
    x = 59,364,680,106.51/280,624.86
  6. Step 6: Final answer
    x = 211,544.62

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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.