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Finding the Fourth Proportional to 922,790.80, 1,384,186.20 and 904,128.40

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Solution

The fourth proportional to 922,790.80, 1,384,186.20 and 904,128.40 is: 1,356,192.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,790.80 : 1,384,186.20 = 904,128.40 : x
  2. Step 2: Convert to fraction form
    922,790.80/1,384,186.20 = 904,128.40/x
  3. Step 3: Cross multiply
    922,790.80x = 1,384,186.20 × 904,128.40
  4. Step 4: Simplify right side
    922,790.80x = 1,251,482,054,308.08
  5. Step 5: Solve for x
    x = 1,251,482,054,308.08/922,790.80
  6. Step 6: Final answer
    x = 1,356,192.60

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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.