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Finding the Fourth Proportional to 2,596,978.40, 3,900,133.20 and 1,887,807.20

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Solution

The fourth proportional to 2,596,978.40, 3,900,133.20 and 1,887,807.20 is: 2,835,102.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,596,978.40 : 3,900,133.20 = 1,887,807.20 : x
  2. Step 2: Convert to fraction form
    2,596,978.40/3,900,133.20 = 1,887,807.20/x
  3. Step 3: Cross multiply
    2,596,978.40x = 3,900,133.20 × 1,887,807.20
  4. Step 4: Simplify right side
    2,596,978.40x = 7,362,699,535,919.04
  5. Step 5: Solve for x
    x = 7,362,699,535,919.04/2,596,978.40
  6. Step 6: Final answer
    x = 2,835,102.34

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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.