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Finding the Fourth Proportional to 279,743.49, 386,048.84 and 152,421.21

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Solution

The fourth proportional to 279,743.49, 386,048.84 and 152,421.21 is: 210,342.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,743.49 : 386,048.84 = 152,421.21 : x
  2. Step 2: Convert to fraction form
    279,743.49/386,048.84 = 152,421.21/x
  3. Step 3: Cross multiply
    279,743.49x = 386,048.84 × 152,421.21
  4. Step 4: Simplify right side
    279,743.49x = 58,842,030,549.79
  5. Step 5: Solve for x
    x = 58,842,030,549.79/279,743.49
  6. Step 6: Final answer
    x = 210,342.81

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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.