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Finding the Fourth Proportional to 279,809.64, 386,136.72 and 152,484.93

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Solution

The fourth proportional to 279,809.64, 386,136.72 and 152,484.93 is: 210,428.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,809.64 : 386,136.72 = 152,484.93 : x
  2. Step 2: Convert to fraction form
    279,809.64/386,136.72 = 152,484.93/x
  3. Step 3: Cross multiply
    279,809.64x = 386,136.72 × 152,484.93
  4. Step 4: Simplify right side
    279,809.64x = 58,880,030,719.63
  5. Step 5: Solve for x
    x = 58,880,030,719.63/279,809.64
  6. Step 6: Final answer
    x = 210,428.89

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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.