Home / 1,428,581.36-1,970,881.07-816,405.71

Finding the Fourth Proportional to 1,428,581.36, 1,970,881.07 and 816,405.71

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Solution

The fourth proportional to 1,428,581.36, 1,970,881.07 and 816,405.71 is: 1,126,319.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,581.36 : 1,970,881.07 = 816,405.71 : x
  2. Step 2: Convert to fraction form
    1,428,581.36/1,970,881.07 = 816,405.71/x
  3. Step 3: Cross multiply
    1,428,581.36x = 1,970,881.07 × 816,405.71
  4. Step 4: Simplify right side
    1,428,581.36x = 1,609,038,551,465.52
  5. Step 5: Solve for x
    x = 1,609,038,551,465.52/1,428,581.36
  6. Step 6: Final answer
    x = 1,126,319.16

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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.