Home / 1,388,158.68-1,915,648.20-776,312.40

Finding the Fourth Proportional to 1,388,158.68, 1,915,648.20 and 776,312.40

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Solution

The fourth proportional to 1,388,158.68, 1,915,648.20 and 776,312.40 is: 1,071,305.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,158.68 : 1,915,648.20 = 776,312.40 : x
  2. Step 2: Convert to fraction form
    1,388,158.68/1,915,648.20 = 776,312.40/x
  3. Step 3: Cross multiply
    1,388,158.68x = 1,915,648.20 × 776,312.40
  4. Step 4: Simplify right side
    1,388,158.68x = 1,487,141,451,697.68
  5. Step 5: Solve for x
    x = 1,487,141,451,697.68/1,388,158.68
  6. Step 6: Final answer
    x = 1,071,305.08

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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.