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Finding the Fourth Proportional to 551,602.09, 761,206.36 and 309,879.57

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Solution

The fourth proportional to 551,602.09, 761,206.36 and 309,879.57 is: 427,631.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,602.09 : 761,206.36 = 309,879.57 : x
  2. Step 2: Convert to fraction form
    551,602.09/761,206.36 = 309,879.57/x
  3. Step 3: Cross multiply
    551,602.09x = 761,206.36 × 309,879.57
  4. Step 4: Simplify right side
    551,602.09x = 235,882,297,968.67
  5. Step 5: Solve for x
    x = 235,882,297,968.67/551,602.09
  6. Step 6: Final answer
    x = 427,631.27

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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.