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Finding the Fourth Proportional to 282,706.60, 390,138.12 and 153,645.08

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Solution

The fourth proportional to 282,706.60, 390,138.12 and 153,645.08 is: 212,031.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,706.60 : 390,138.12 = 153,645.08 : x
  2. Step 2: Convert to fraction form
    282,706.60/390,138.12 = 153,645.08/x
  3. Step 3: Cross multiply
    282,706.60x = 390,138.12 × 153,645.08
  4. Step 4: Simplify right side
    282,706.60x = 59,942,802,179.16
  5. Step 5: Solve for x
    x = 59,942,802,179.16/282,706.60
  6. Step 6: Final answer
    x = 212,031.85

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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.