Home / 1,386,996.40-2,081,185.80-788,417.20

Finding the Fourth Proportional to 1,386,996.40, 2,081,185.80 and 788,417.20

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Solution

The fourth proportional to 1,386,996.40, 2,081,185.80 and 788,417.20 is: 1,183,018.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,996.40 : 2,081,185.80 = 788,417.20 : x
  2. Step 2: Convert to fraction form
    1,386,996.40/2,081,185.80 = 788,417.20/x
  3. Step 3: Cross multiply
    1,386,996.40x = 2,081,185.80 × 788,417.20
  4. Step 4: Simplify right side
    1,386,996.40x = 1,640,842,681,115.76
  5. Step 5: Solve for x
    x = 1,640,842,681,115.76/1,386,996.40
  6. Step 6: Final answer
    x = 1,183,018.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.