Home / 305,440.08-455,680.04-288,906.40

Finding the Fourth Proportional to 305,440.08, 455,680.04 and 288,906.40

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Solution

The fourth proportional to 305,440.08, 455,680.04 and 288,906.40 is: 431,013.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,440.08 : 455,680.04 = 288,906.40 : x
  2. Step 2: Convert to fraction form
    305,440.08/455,680.04 = 288,906.40/x
  3. Step 3: Cross multiply
    305,440.08x = 455,680.04 × 288,906.40
  4. Step 4: Simplify right side
    305,440.08x = 131,648,879,908.26
  5. Step 5: Solve for x
    x = 131,648,879,908.26/305,440.08
  6. Step 6: Final answer
    x = 431,013.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.