Home / 990,043.44-1,485,689.88-421,423.63

Finding the Fourth Proportional to 990,043.44, 1,485,689.88 and 421,423.63

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Solution

The fourth proportional to 990,043.44, 1,485,689.88 and 421,423.63 is: 632,401.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,043.44 : 1,485,689.88 = 421,423.63 : x
  2. Step 2: Convert to fraction form
    990,043.44/1,485,689.88 = 421,423.63/x
  3. Step 3: Cross multiply
    990,043.44x = 1,485,689.88 × 421,423.63
  4. Step 4: Simplify right side
    990,043.44x = 626,104,820,176.75
  5. Step 5: Solve for x
    x = 626,104,820,176.75/990,043.44
  6. Step 6: Final answer
    x = 632,401.36

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1.5x scale

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.