Home / 859,678.20-1,289,528.10-260,645.40

Finding the Fourth Proportional to 859,678.20, 1,289,528.10 and 260,645.40

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Solution

The fourth proportional to 859,678.20, 1,289,528.10 and 260,645.40 is: 390,971.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,678.20 : 1,289,528.10 = 260,645.40 : x
  2. Step 2: Convert to fraction form
    859,678.20/1,289,528.10 = 260,645.40/x
  3. Step 3: Cross multiply
    859,678.20x = 1,289,528.10 × 260,645.40
  4. Step 4: Simplify right side
    859,678.20x = 336,109,567,435.74
  5. Step 5: Solve for x
    x = 336,109,567,435.74/859,678.20
  6. Step 6: Final answer
    x = 390,971.37

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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.