Home / 928,015,971.87-1,280,686,312.95-504,654,393.87

Finding the Fourth Proportional to 928,015,971.87, 1,280,686,312.95 and 504,654,393.87

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Solution

The fourth proportional to 928,015,971.87, 1,280,686,312.95 and 504,654,393.87 is: 696,436,262.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,015,971.87 : 1,280,686,312.95 = 504,654,393.87 : x
  2. Step 2: Convert to fraction form
    928,015,971.87/1,280,686,312.95 = 504,654,393.87/x
  3. Step 3: Cross multiply
    928,015,971.87x = 1,280,686,312.95 × 504,654,393.87
  4. Step 4: Simplify right side
    928,015,971.87x = 646,303,974,999,387,392
  5. Step 5: Solve for x
    x = 646,303,974,999,387,392/928,015,971.87
  6. Step 6: Final answer
    x = 696,436,262.51

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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.