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Finding the Fourth Proportional to 282,628.40, 390,048.92 and 161,807.60

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Solution

The fourth proportional to 282,628.40, 390,048.92 and 161,807.60 is: 223,306.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,628.40 : 390,048.92 = 161,807.60 : x
  2. Step 2: Convert to fraction form
    282,628.40/390,048.92 = 161,807.60/x
  3. Step 3: Cross multiply
    282,628.40x = 390,048.92 × 161,807.60
  4. Step 4: Simplify right side
    282,628.40x = 63,112,879,627.79
  5. Step 5: Solve for x
    x = 63,112,879,627.79/282,628.40
  6. Step 6: Final answer
    x = 223,306.93

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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.