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Finding the Fourth Proportional to 298,712.80, 448,069.20 and 266,053.60

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Solution

The fourth proportional to 298,712.80, 448,069.20 and 266,053.60 is: 399,080.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,712.80 : 448,069.20 = 266,053.60 : x
  2. Step 2: Convert to fraction form
    298,712.80/448,069.20 = 266,053.60/x
  3. Step 3: Cross multiply
    298,712.80x = 448,069.20 × 266,053.60
  4. Step 4: Simplify right side
    298,712.80x = 119,210,423,709.12
  5. Step 5: Solve for x
    x = 119,210,423,709.12/298,712.80
  6. Step 6: Final answer
    x = 399,080.40

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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.