Home / 815,426,490.80-1,223,139,736.20-509,661,729.20

Finding the Fourth Proportional to 815,426,490.80, 1,223,139,736.20 and 509,661,729.20

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Solution

The fourth proportional to 815,426,490.80, 1,223,139,736.20 and 509,661,729.20 is: 764,492,593.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,426,490.80 : 1,223,139,736.20 = 509,661,729.20 : x
  2. Step 2: Convert to fraction form
    815,426,490.80/1,223,139,736.20 = 509,661,729.20/x
  3. Step 3: Cross multiply
    815,426,490.80x = 1,223,139,736.20 × 509,661,729.20
  4. Step 4: Simplify right side
    815,426,490.80x = 623,387,513,004,923,904
  5. Step 5: Solve for x
    x = 623,387,513,004,923,904/815,426,490.80
  6. Step 6: Final answer
    x = 764,492,593.80

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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.