Home / 1,918,918.65-2,878,372.30-781,412.97

Finding the Fourth Proportional to 1,918,918.65, 2,878,372.30 and 781,412.97

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Solution

The fourth proportional to 1,918,918.65, 2,878,372.30 and 781,412.97 is: 1,172,117.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918,918.65 : 2,878,372.30 = 781,412.97 : x
  2. Step 2: Convert to fraction form
    1,918,918.65/2,878,372.30 = 781,412.97/x
  3. Step 3: Cross multiply
    1,918,918.65x = 2,878,372.30 × 781,412.97
  4. Step 4: Simplify right side
    1,918,918.65x = 2,249,197,447,708.73
  5. Step 5: Solve for x
    x = 2,249,197,447,708.73/1,918,918.65
  6. Step 6: Final answer
    x = 1,172,117.14

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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.