Home / 1,312,781.20-1,811,975.10-855,036.40

Finding the Fourth Proportional to 1,312,781.20, 1,811,975.10 and 855,036.40

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Solution

The fourth proportional to 1,312,781.20, 1,811,975.10 and 855,036.40 is: 1,180,169.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,781.20 : 1,811,975.10 = 855,036.40 : x
  2. Step 2: Convert to fraction form
    1,312,781.20/1,811,975.10 = 855,036.40/x
  3. Step 3: Cross multiply
    1,312,781.20x = 1,811,975.10 × 855,036.40
  4. Step 4: Simplify right side
    1,312,781.20x = 1,549,304,666,393.64
  5. Step 5: Solve for x
    x = 1,549,304,666,393.64/1,312,781.20
  6. Step 6: Final answer
    x = 1,180,169.75

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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.