Home / 1,390,637.15-1,917,616.82-1,028,814.40

Finding the Fourth Proportional to 1,390,637.15, 1,917,616.82 and 1,028,814.40

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Solution

The fourth proportional to 1,390,637.15, 1,917,616.82 and 1,028,814.40 is: 1,418,681.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,637.15 : 1,917,616.82 = 1,028,814.40 : x
  2. Step 2: Convert to fraction form
    1,390,637.15/1,917,616.82 = 1,028,814.40/x
  3. Step 3: Cross multiply
    1,390,637.15x = 1,917,616.82 × 1,028,814.40
  4. Step 4: Simplify right side
    1,390,637.15x = 1,972,871,804,690.08
  5. Step 5: Solve for x
    x = 1,972,871,804,690.08/1,390,637.15
  6. Step 6: Final answer
    x = 1,418,681.94

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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.