Home / 1,128,712.36-1,693,120.38-287,271.40

Finding the Fourth Proportional to 1,128,712.36, 1,693,120.38 and 287,271.40

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Solution

The fourth proportional to 1,128,712.36, 1,693,120.38 and 287,271.40 is: 430,920.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,712.36 : 1,693,120.38 = 287,271.40 : x
  2. Step 2: Convert to fraction form
    1,128,712.36/1,693,120.38 = 287,271.40/x
  3. Step 3: Cross multiply
    1,128,712.36x = 1,693,120.38 × 287,271.40
  4. Step 4: Simplify right side
    1,128,712.36x = 486,385,061,931.13
  5. Step 5: Solve for x
    x = 486,385,061,931.13/1,128,712.36
  6. Step 6: Final answer
    x = 430,920.29

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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.