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Finding the Fourth Proportional to 308,503.89, 425,766.78 and 187,653.51

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Solution

The fourth proportional to 308,503.89, 425,766.78 and 187,653.51 is: 258,980.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,503.89 : 425,766.78 = 187,653.51 : x
  2. Step 2: Convert to fraction form
    308,503.89/425,766.78 = 187,653.51/x
  3. Step 3: Cross multiply
    308,503.89x = 425,766.78 × 187,653.51
  4. Step 4: Simplify right side
    308,503.89x = 79,896,630,708.40
  5. Step 5: Solve for x
    x = 79,896,630,708.40/308,503.89
  6. Step 6: Final answer
    x = 258,980.95

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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.