Home / 920,828.52-1,381,111.56-289,725.93

Finding the Fourth Proportional to 920,828.52, 1,381,111.56 and 289,725.93

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Solution

The fourth proportional to 920,828.52, 1,381,111.56 and 289,725.93 is: 434,547.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,828.52 : 1,381,111.56 = 289,725.93 : x
  2. Step 2: Convert to fraction form
    920,828.52/1,381,111.56 = 289,725.93/x
  3. Step 3: Cross multiply
    920,828.52x = 1,381,111.56 × 289,725.93
  4. Step 4: Simplify right side
    920,828.52x = 400,143,831,154.75
  5. Step 5: Solve for x
    x = 400,143,831,154.75/920,828.52
  6. Step 6: Final answer
    x = 434,547.61

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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.