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Finding the Fourth Proportional to 278,423.01, 384,221.70 and 151,095.87

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Solution

The fourth proportional to 278,423.01, 384,221.70 and 151,095.87 is: 208,511.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,423.01 : 384,221.70 = 151,095.87 : x
  2. Step 2: Convert to fraction form
    278,423.01/384,221.70 = 151,095.87/x
  3. Step 3: Cross multiply
    278,423.01x = 384,221.70 × 151,095.87
  4. Step 4: Simplify right side
    278,423.01x = 58,054,312,034.38
  5. Step 5: Solve for x
    x = 58,054,312,034.38/278,423.01
  6. Step 6: Final answer
    x = 208,511.19

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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.