Home / 1,120,688.30-1,679,064.15-919,921.70

Finding the Fourth Proportional to 1,120,688.30, 1,679,064.15 and 919,921.70

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Solution

The fourth proportional to 1,120,688.30, 1,679,064.15 and 919,921.70 is: 1,378,266.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120,688.30 : 1,679,064.15 = 919,921.70 : x
  2. Step 2: Convert to fraction form
    1,120,688.30/1,679,064.15 = 919,921.70/x
  3. Step 3: Cross multiply
    1,120,688.30x = 1,679,064.15 × 919,921.70
  4. Step 4: Simplify right side
    1,120,688.30x = 1,544,607,547,277.06
  5. Step 5: Solve for x
    x = 1,544,607,547,277.06/1,120,688.30
  6. Step 6: Final answer
    x = 1,378,266.86

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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.