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Finding the Fourth Proportional to 278,303.31, 383,860.56 and 255,407.07

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Solution

The fourth proportional to 278,303.31, 383,860.56 and 255,407.07 is: 352,280.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,303.31 : 383,860.56 = 255,407.07 : x
  2. Step 2: Convert to fraction form
    278,303.31/383,860.56 = 255,407.07/x
  3. Step 3: Cross multiply
    278,303.31x = 383,860.56 × 255,407.07
  4. Step 4: Simplify right side
    278,303.31x = 98,040,700,918.16
  5. Step 5: Solve for x
    x = 98,040,700,918.16/278,303.31
  6. Step 6: Final answer
    x = 352,280.04

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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.