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Finding the Fourth Proportional to 780,020, 1,170,030 and 189,044

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Solution

The fourth proportional to 780,020, 1,170,030 and 189,044 is: 283,566

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,020 : 1,170,030 = 189,044 : x
  2. Step 2: Convert to fraction form
    780,020/1,170,030 = 189,044/x
  3. Step 3: Cross multiply
    780,020x = 1,170,030 × 189,044
  4. Step 4: Simplify right side
    780,020x = 221,187,151,320
  5. Step 5: Solve for x
    x = 221,187,151,320/780,020
  6. Step 6: Final answer
    x = 283,566

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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.