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Finding the Fourth Proportional to 282,866.55, 390,355.84 and 155,542.15

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Solution

The fourth proportional to 282,866.55, 390,355.84 and 155,542.15 is: 214,648.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,866.55 : 390,355.84 = 155,542.15 : x
  2. Step 2: Convert to fraction form
    282,866.55/390,355.84 = 155,542.15/x
  3. Step 3: Cross multiply
    282,866.55x = 390,355.84 × 155,542.15
  4. Step 4: Simplify right side
    282,866.55x = 60,716,785,542.74
  5. Step 5: Solve for x
    x = 60,716,785,542.74/282,866.55
  6. Step 6: Final answer
    x = 214,648.16

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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.