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Finding the Fourth Proportional to 666,775.08, 920,140.11 and 380,299.95

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Solution

The fourth proportional to 666,775.08, 920,140.11 and 380,299.95 is: 524,808.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,775.08 : 920,140.11 = 380,299.95 : x
  2. Step 2: Convert to fraction form
    666,775.08/920,140.11 = 380,299.95/x
  3. Step 3: Cross multiply
    666,775.08x = 920,140.11 × 380,299.95
  4. Step 4: Simplify right side
    666,775.08x = 349,929,237,826.00
  5. Step 5: Solve for x
    x = 349,929,237,826.00/666,775.08
  6. Step 6: Final answer
    x = 524,808.51

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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.