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Finding the Fourth Proportional to 278,810.66, 384,762.21 and 151,488.38

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Solution

The fourth proportional to 278,810.66, 384,762.21 and 151,488.38 is: 209,055.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,810.66 : 384,762.21 = 151,488.38 : x
  2. Step 2: Convert to fraction form
    278,810.66/384,762.21 = 151,488.38/x
  3. Step 3: Cross multiply
    278,810.66x = 384,762.21 × 151,488.38
  4. Step 4: Simplify right side
    278,810.66x = 58,287,003,878.12
  5. Step 5: Solve for x
    x = 58,287,003,878.12/278,810.66
  6. Step 6: Final answer
    x = 209,055.87

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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.