Home / 1,290,316.81-1,778,011.28-998,153.66

Finding the Fourth Proportional to 1,290,316.81, 1,778,011.28 and 998,153.66

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Solution

The fourth proportional to 1,290,316.81, 1,778,011.28 and 998,153.66 is: 1,375,420.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,316.81 : 1,778,011.28 = 998,153.66 : x
  2. Step 2: Convert to fraction form
    1,290,316.81/1,778,011.28 = 998,153.66/x
  3. Step 3: Cross multiply
    1,290,316.81x = 1,778,011.28 × 998,153.66
  4. Step 4: Simplify right side
    1,290,316.81x = 1,774,728,466,653.29
  5. Step 5: Solve for x
    x = 1,774,728,466,653.29/1,290,316.81
  6. Step 6: Final answer
    x = 1,375,420.71

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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.