Home / 1,355,381.52-1,870,485.64-811,412.52

Finding the Fourth Proportional to 1,355,381.52, 1,870,485.64 and 811,412.52

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Solution

The fourth proportional to 1,355,381.52, 1,870,485.64 and 811,412.52 is: 1,119,784.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355,381.52 : 1,870,485.64 = 811,412.52 : x
  2. Step 2: Convert to fraction form
    1,355,381.52/1,870,485.64 = 811,412.52/x
  3. Step 3: Cross multiply
    1,355,381.52x = 1,870,485.64 × 811,412.52
  4. Step 4: Simplify right side
    1,355,381.52x = 1,517,735,466,776.21
  5. Step 5: Solve for x
    x = 1,517,735,466,776.21/1,355,381.52
  6. Step 6: Final answer
    x = 1,119,784.68

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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.