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Finding the Fourth Proportional to 255,486.54, 383,289.16 and 87,008.31

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Solution

The fourth proportional to 255,486.54, 383,289.16 and 87,008.31 is: 130,532.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,486.54 : 383,289.16 = 87,008.31 : x
  2. Step 2: Convert to fraction form
    255,486.54/383,289.16 = 87,008.31/x
  3. Step 3: Cross multiply
    255,486.54x = 383,289.16 × 87,008.31
  4. Step 4: Simplify right side
    255,486.54x = 33,349,343,967.31
  5. Step 5: Solve for x
    x = 33,349,343,967.31/255,486.54
  6. Step 6: Final answer
    x = 130,532.69

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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.