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Finding the Fourth Proportional to 764,208.90, 1,146,276.90 and 258,720.30

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Solution

The fourth proportional to 764,208.90, 1,146,276.90 and 258,720.30 is: 388,068.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,208.90 : 1,146,276.90 = 258,720.30 : x
  2. Step 2: Convert to fraction form
    764,208.90/1,146,276.90 = 258,720.30/x
  3. Step 3: Cross multiply
    764,208.90x = 1,146,276.90 × 258,720.30
  4. Step 4: Simplify right side
    764,208.90x = 296,565,103,451.07
  5. Step 5: Solve for x
    x = 296,565,103,451.07/764,208.90
  6. Step 6: Final answer
    x = 388,068.11

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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.