Home / 289,983.40-434,975.10-278,319.40

Finding the Fourth Proportional to 289,983.40, 434,975.10 and 278,319.40

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Solution

The fourth proportional to 289,983.40, 434,975.10 and 278,319.40 is: 417,479.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,983.40 : 434,975.10 = 278,319.40 : x
  2. Step 2: Convert to fraction form
    289,983.40/434,975.10 = 278,319.40/x
  3. Step 3: Cross multiply
    289,983.40x = 434,975.10 × 278,319.40
  4. Step 4: Simplify right side
    289,983.40x = 121,062,008,846.94
  5. Step 5: Solve for x
    x = 121,062,008,846.94/289,983.40
  6. Step 6: Final answer
    x = 417,479.10

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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.