Finding the Fourth Proportional to 717,930,186.84, 990,743,659.74 and 387,905,325.84
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Solution
The fourth proportional to 717,930,186.84, 990,743,659.74 and 387,905,325.84 is: 535,309,350.69
Step by Step Solution
- Step 1: Write the proportion equation
717,930,186.84 : 990,743,659.74 = 387,905,325.84 : x - Step 2: Convert to fraction form
717,930,186.84/990,743,659.74 = 387,905,325.84/x - Step 3: Cross multiply
717,930,186.84x = 990,743,659.74 × 387,905,325.84 - Step 4: Simplify right side
717,930,186.84x = 384,314,742,155,358,784 - Step 5: Solve for x
x = 384,314,742,155,358,784/717,930,186.84 - Step 6: Final answer
x = 535,309,350.69
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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.