Finding the Fourth Proportional to 680,749,270.72, 939,867,746.74 and 555,599,990.91
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Solution
The fourth proportional to 680,749,270.72, 939,867,746.74 and 555,599,990.91 is: 767,081,999.20
Step by Step Solution
- Step 1: Write the proportion equation
680,749,270.72 : 939,867,746.74 = 555,599,990.91 : x - Step 2: Convert to fraction form
680,749,270.72/939,867,746.74 = 555,599,990.91/x - Step 3: Cross multiply
680,749,270.72x = 939,867,746.74 × 555,599,990.91 - Step 4: Simplify right side
680,749,270.72x = 522,190,511,537,868,800 - Step 5: Solve for x
x = 522,190,511,537,868,800/680,749,270.72 - Step 6: Final answer
x = 767,081,999.20
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Double scale
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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.