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Finding the Fourth Proportional to 279,765, 386,075.88 and 152,440.56

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Solution

The fourth proportional to 279,765, 386,075.88 and 152,440.56 is: 210,368.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,765 : 386,075.88 = 152,440.56 : x
  2. Step 2: Convert to fraction form
    279,765/386,075.88 = 152,440.56/x
  3. Step 3: Cross multiply
    279,765x = 386,075.88 × 152,440.56
  4. Step 4: Simplify right side
    279,765x = 58,853,623,349.69
  5. Step 5: Solve for x
    x = 58,853,623,349.69/279,765
  6. Step 6: Final answer
    x = 210,368.07

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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.