Home / 1,217,830.56-1,680,579.63-666,543.60

Finding the Fourth Proportional to 1,217,830.56, 1,680,579.63 and 666,543.60

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Solution

The fourth proportional to 1,217,830.56, 1,680,579.63 and 666,543.60 is: 919,815.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,830.56 : 1,680,579.63 = 666,543.60 : x
  2. Step 2: Convert to fraction form
    1,217,830.56/1,680,579.63 = 666,543.60/x
  3. Step 3: Cross multiply
    1,217,830.56x = 1,680,579.63 × 666,543.60
  4. Step 4: Simplify right side
    1,217,830.56x = 1,120,179,596,666.87
  5. Step 5: Solve for x
    x = 1,120,179,596,666.87/1,217,830.56
  6. Step 6: Final answer
    x = 919,815.64

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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.