Home / 990,043.13-1,485,689.41-421,423.32

Finding the Fourth Proportional to 990,043.13, 1,485,689.41 and 421,423.32

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Solution

The fourth proportional to 990,043.13, 1,485,689.41 and 421,423.32 is: 632,400.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,043.13 : 1,485,689.41 = 421,423.32 : x
  2. Step 2: Convert to fraction form
    990,043.13/1,485,689.41 = 421,423.32/x
  3. Step 3: Cross multiply
    990,043.13x = 1,485,689.41 × 421,423.32
  4. Step 4: Simplify right side
    990,043.13x = 626,104,163,651.04
  5. Step 5: Solve for x
    x = 626,104,163,651.04/990,043.13
  6. Step 6: Final answer
    x = 632,400.90

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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.