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Finding the Fourth Proportional to 282,790.85, 390,267.11 and 155,492.87

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Solution

The fourth proportional to 282,790.85, 390,267.11 and 155,492.87 is: 214,588.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,790.85 : 390,267.11 = 155,492.87 : x
  2. Step 2: Convert to fraction form
    282,790.85/390,267.11 = 155,492.87/x
  3. Step 3: Cross multiply
    282,790.85x = 390,267.11 × 155,492.87
  4. Step 4: Simplify right side
    282,790.85x = 60,683,751,437.90
  5. Step 5: Solve for x
    x = 60,683,751,437.90/282,790.85
  6. Step 6: Final answer
    x = 214,588.81

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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.