Home / 1,355,376.51-1,870,478.73-811,407.51

Finding the Fourth Proportional to 1,355,376.51, 1,870,478.73 and 811,407.51

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Solution

The fourth proportional to 1,355,376.51, 1,870,478.73 and 811,407.51 is: 1,119,777.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355,376.51 : 1,870,478.73 = 811,407.51 : x
  2. Step 2: Convert to fraction form
    1,355,376.51/1,870,478.73 = 811,407.51/x
  3. Step 3: Cross multiply
    1,355,376.51x = 1,870,478.73 × 811,407.51
  4. Step 4: Simplify right side
    1,355,376.51x = 1,517,720,488,817.26
  5. Step 5: Solve for x
    x = 1,517,720,488,817.26/1,355,376.51
  6. Step 6: Final answer
    x = 1,119,777.77

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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.