Home / 900,108.86-1,242,131.49-492,206.09

Finding the Fourth Proportional to 900,108.86, 1,242,131.49 and 492,206.09

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Solution

The fourth proportional to 900,108.86, 1,242,131.49 and 492,206.09 is: 679,234.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,108.86 : 1,242,131.49 = 492,206.09 : x
  2. Step 2: Convert to fraction form
    900,108.86/1,242,131.49 = 492,206.09/x
  3. Step 3: Cross multiply
    900,108.86x = 1,242,131.49 × 492,206.09
  4. Step 4: Simplify right side
    900,108.86x = 611,384,677,748.12
  5. Step 5: Solve for x
    x = 611,384,677,748.12/900,108.86
  6. Step 6: Final answer
    x = 679,234.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.