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Finding the Fourth Proportional to 282,871.74, 390,364.39 and 155,555.58

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Solution

The fourth proportional to 282,871.74, 390,364.39 and 155,555.58 is: 214,667.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,871.74 : 390,364.39 = 155,555.58 : x
  2. Step 2: Convert to fraction form
    282,871.74/390,364.39 = 155,555.58/x
  3. Step 3: Cross multiply
    282,871.74x = 390,364.39 × 155,555.58
  4. Step 4: Simplify right side
    282,871.74x = 60,723,359,097.80
  5. Step 5: Solve for x
    x = 60,723,359,097.80/282,871.74
  6. Step 6: Final answer
    x = 214,667.46

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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.