Home / 3,985,688.80-5,979,116.40-1,289,555.20

Finding the Fourth Proportional to 3,985,688.80, 5,979,116.40 and 1,289,555.20

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Solution

The fourth proportional to 3,985,688.80, 5,979,116.40 and 1,289,555.20 is: 1,934,521.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985,688.80 : 5,979,116.40 = 1,289,555.20 : x
  2. Step 2: Convert to fraction form
    3,985,688.80/5,979,116.40 = 1,289,555.20/x
  3. Step 3: Cross multiply
    3,985,688.80x = 5,979,116.40 × 1,289,555.20
  4. Step 4: Simplify right side
    3,985,688.80x = 7,710,400,645,025.28
  5. Step 5: Solve for x
    x = 7,710,400,645,025.28/3,985,688.80
  6. Step 6: Final answer
    x = 1,934,521.49

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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.