Home / 990,859.72-1,485,909.24-421,880.08

Finding the Fourth Proportional to 990,859.72, 1,485,909.24 and 421,880.08

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Solution

The fourth proportional to 990,859.72, 1,485,909.24 and 421,880.08 is: 632,658.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,859.72 : 1,485,909.24 = 421,880.08 : x
  2. Step 2: Convert to fraction form
    990,859.72/1,485,909.24 = 421,880.08/x
  3. Step 3: Cross multiply
    990,859.72x = 1,485,909.24 × 421,880.08
  4. Step 4: Simplify right side
    990,859.72x = 626,875,509,043.94
  5. Step 5: Solve for x
    x = 626,875,509,043.94/990,859.72
  6. Step 6: Final answer
    x = 632,658.18

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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.