Home / 780,710.40-1,172,815.20-748,828.80

Finding the Fourth Proportional to 780,710.40, 1,172,815.20 and 748,828.80

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Solution

The fourth proportional to 780,710.40, 1,172,815.20 and 748,828.80 is: 1,124,921.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,710.40 : 1,172,815.20 = 748,828.80 : x
  2. Step 2: Convert to fraction form
    780,710.40/1,172,815.20 = 748,828.80/x
  3. Step 3: Cross multiply
    780,710.40x = 1,172,815.20 × 748,828.80
  4. Step 4: Simplify right side
    780,710.40x = 878,237,798,837.76
  5. Step 5: Solve for x
    x = 878,237,798,837.76/780,710.40
  6. Step 6: Final answer
    x = 1,124,921.35

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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.