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Finding the Fourth Proportional to 279,689.95, 385,971.60 and 152,365.51

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Solution

The fourth proportional to 279,689.95, 385,971.60 and 152,365.51 is: 210,264.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,689.95 : 385,971.60 = 152,365.51 : x
  2. Step 2: Convert to fraction form
    279,689.95/385,971.60 = 152,365.51/x
  3. Step 3: Cross multiply
    279,689.95x = 385,971.60 × 152,365.51
  4. Step 4: Simplify right side
    279,689.95x = 58,808,759,679.52
  5. Step 5: Solve for x
    x = 58,808,759,679.52/279,689.95
  6. Step 6: Final answer
    x = 210,264.11

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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.