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Finding the Fourth Proportional to 255,428.94, 383,139.25 and 87,066.50

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Solution

The fourth proportional to 255,428.94, 383,139.25 and 87,066.50 is: 130,598.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,428.94 : 383,139.25 = 87,066.50 : x
  2. Step 2: Convert to fraction form
    255,428.94/383,139.25 = 87,066.50/x
  3. Step 3: Cross multiply
    255,428.94x = 383,139.25 × 87,066.50
  4. Step 4: Simplify right side
    255,428.94x = 33,358,591,376.76
  5. Step 5: Solve for x
    x = 33,358,591,376.76/255,428.94
  6. Step 6: Final answer
    x = 130,598.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.