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Finding the Fourth Proportional to 278,762.95, 384,693.33 and 151,438.66

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Solution

The fourth proportional to 278,762.95, 384,693.33 and 151,438.66 is: 208,985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,762.95 : 384,693.33 = 151,438.66 : x
  2. Step 2: Convert to fraction form
    278,762.95/384,693.33 = 151,438.66/x
  3. Step 3: Cross multiply
    278,762.95x = 384,693.33 × 151,438.66
  4. Step 4: Simplify right side
    278,762.95x = 58,257,442,406.14
  5. Step 5: Solve for x
    x = 58,257,442,406.14/278,762.95
  6. Step 6: Final answer
    x = 208,985.60

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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.