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Finding the Fourth Proportional to 282,879.10, 390,373.14 and 155,554.66

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Solution

The fourth proportional to 282,879.10, 390,373.14 and 155,554.66 is: 214,665.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,879.10 : 390,373.14 = 155,554.66 : x
  2. Step 2: Convert to fraction form
    282,879.10/390,373.14 = 155,554.66/x
  3. Step 3: Cross multiply
    282,879.10x = 390,373.14 × 155,554.66
  4. Step 4: Simplify right side
    282,879.10x = 60,724,361,065.83
  5. Step 5: Solve for x
    x = 60,724,361,065.83/282,879.10
  6. Step 6: Final answer
    x = 214,665.42

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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.