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Finding the Fourth Proportional to 261,027.30, 390,666.15 and 261,027.30

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Solution

The fourth proportional to 261,027.30, 390,666.15 and 261,027.30 is: 390,666.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,027.30 : 390,666.15 = 261,027.30 : x
  2. Step 2: Convert to fraction form
    261,027.30/390,666.15 = 261,027.30/x
  3. Step 3: Cross multiply
    261,027.30x = 390,666.15 × 261,027.30
  4. Step 4: Simplify right side
    261,027.30x = 101,974,530,335.90
  5. Step 5: Solve for x
    x = 101,974,530,335.90/261,027.30
  6. Step 6: Final answer
    x = 390,666.15

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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.