Home / 1,189,706.28-1,641,783.18-645,830.40

Finding the Fourth Proportional to 1,189,706.28, 1,641,783.18 and 645,830.40

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Solution

The fourth proportional to 1,189,706.28, 1,641,783.18 and 645,830.40 is: 891,239.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,706.28 : 1,641,783.18 = 645,830.40 : x
  2. Step 2: Convert to fraction form
    1,189,706.28/1,641,783.18 = 645,830.40/x
  3. Step 3: Cross multiply
    1,189,706.28x = 1,641,783.18 × 645,830.40
  4. Step 4: Simplify right side
    1,189,706.28x = 1,060,313,487,852.67
  5. Step 5: Solve for x
    x = 1,060,313,487,852.67/1,189,706.28
  6. Step 6: Final answer
    x = 891,239.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.