Home / 1,555,803-2,147,008.20-840,411

Finding the Fourth Proportional to 1,555,803, 2,147,008.20 and 840,411

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Solution

The fourth proportional to 1,555,803, 2,147,008.20 and 840,411 is: 1,159,767.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555,803 : 2,147,008.20 = 840,411 : x
  2. Step 2: Convert to fraction form
    1,555,803/2,147,008.20 = 840,411/x
  3. Step 3: Cross multiply
    1,555,803x = 2,147,008.20 × 840,411
  4. Step 4: Simplify right side
    1,555,803x = 1,804,369,308,370.20
  5. Step 5: Solve for x
    x = 1,804,369,308,370.20/1,555,803
  6. Step 6: Final answer
    x = 1,159,767.21

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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.