Home / 1,218,048,491.52-1,680,908,618.88-661,131,653.76

Finding the Fourth Proportional to 1,218,048,491.52, 1,680,908,618.88 and 661,131,653.76

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Solution

The fourth proportional to 1,218,048,491.52, 1,680,908,618.88 and 661,131,653.76 is: 912,362,605.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,048,491.52 : 1,680,908,618.88 = 661,131,653.76 : x
  2. Step 2: Convert to fraction form
    1,218,048,491.52/1,680,908,618.88 = 661,131,653.76/x
  3. Step 3: Cross multiply
    1,218,048,491.52x = 1,680,908,618.88 × 661,131,653.76
  4. Step 4: Simplify right side
    1,218,048,491.52x = 1,111,301,895,019,571,968
  5. Step 5: Solve for x
    x = 1,111,301,895,019,571,968/1,218,048,491.52
  6. Step 6: Final answer
    x = 912,362,605.23

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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.