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Finding the Fourth Proportional to 660,266.10, 990,107.55 and 260,774.10

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Solution

The fourth proportional to 660,266.10, 990,107.55 and 260,774.10 is: 391,045.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,266.10 : 990,107.55 = 260,774.10 : x
  2. Step 2: Convert to fraction form
    660,266.10/990,107.55 = 260,774.10/x
  3. Step 3: Cross multiply
    660,266.10x = 990,107.55 × 260,774.10
  4. Step 4: Simplify right side
    660,266.10x = 258,194,405,254.46
  5. Step 5: Solve for x
    x = 258,194,405,254.46/660,266.10
  6. Step 6: Final answer
    x = 391,045.98

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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.