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Finding the Fourth Proportional to 261,027.80, 390,666.90 and 261,027.80

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Solution

The fourth proportional to 261,027.80, 390,666.90 and 261,027.80 is: 390,666.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,027.80 : 390,666.90 = 261,027.80 : x
  2. Step 2: Convert to fraction form
    261,027.80/390,666.90 = 261,027.80/x
  3. Step 3: Cross multiply
    261,027.80x = 390,666.90 × 261,027.80
  4. Step 4: Simplify right side
    261,027.80x = 101,974,921,439.82
  5. Step 5: Solve for x
    x = 101,974,921,439.82/261,027.80
  6. Step 6: Final answer
    x = 390,666.90

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1.5x scale

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.