Finding the Fourth Proportional to 708,364,745.36, 977,546,743.84 and 390,824,975.28
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Solution
The fourth proportional to 708,364,745.36, 977,546,743.84 and 390,824,975.28 is: 539,340,339.14
Step by Step Solution
- Step 1: Write the proportion equation
708,364,745.36 : 977,546,743.84 = 390,824,975.28 : x - Step 2: Convert to fraction form
708,364,745.36/977,546,743.84 = 390,824,975.28/x - Step 3: Cross multiply
708,364,745.36x = 977,546,743.84 × 390,824,975.28 - Step 4: Simplify right side
708,364,745.36x = 382,049,681,996,312,448 - Step 5: Solve for x
x = 382,049,681,996,312,448/708,364,745.36 - Step 6: Final answer
x = 539,340,339.14
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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.