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Finding the Fourth Proportional to 972,172.20, 1,357,891.80 and 972,172.20

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Solution

The fourth proportional to 972,172.20, 1,357,891.80 and 972,172.20 is: 1,357,891.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    972,172.20 : 1,357,891.80 = 972,172.20 : x
  2. Step 2: Convert to fraction form
    972,172.20/1,357,891.80 = 972,172.20/x
  3. Step 3: Cross multiply
    972,172.20x = 1,357,891.80 × 972,172.20
  4. Step 4: Simplify right side
    972,172.20x = 1,320,104,658,567.96
  5. Step 5: Solve for x
    x = 1,320,104,658,567.96/972,172.20
  6. Step 6: Final answer
    x = 1,357,891.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.