Home / 1,918,916.40-2,878,368.93-781,410.72

Finding the Fourth Proportional to 1,918,916.40, 2,878,368.93 and 781,410.72

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Solution

The fourth proportional to 1,918,916.40, 2,878,368.93 and 781,410.72 is: 1,172,113.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918,916.40 : 2,878,368.93 = 781,410.72 : x
  2. Step 2: Convert to fraction form
    1,918,916.40/2,878,368.93 = 781,410.72/x
  3. Step 3: Cross multiply
    1,918,916.40x = 2,878,368.93 × 781,410.72
  4. Step 4: Simplify right side
    1,918,916.40x = 2,249,188,338,016.93
  5. Step 5: Solve for x
    x = 2,249,188,338,016.93/1,918,916.40
  6. Step 6: Final answer
    x = 1,172,113.77

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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.