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Finding the Fourth Proportional to 280,626.86, 387,246.84 and 153,302.42

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Solution

The fourth proportional to 280,626.86, 387,246.84 and 153,302.42 is: 211,547.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,626.86 : 387,246.84 = 153,302.42 : x
  2. Step 2: Convert to fraction form
    280,626.86/387,246.84 = 153,302.42/x
  3. Step 3: Cross multiply
    280,626.86x = 387,246.84 × 153,302.42
  4. Step 4: Simplify right side
    280,626.86x = 59,365,877,709.35
  5. Step 5: Solve for x
    x = 59,365,877,709.35/280,626.86
  6. Step 6: Final answer
    x = 211,547.38

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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.