Finding the Fourth Proportional to 912,234,525.64, 1,258,977,474.05 and 555,027,661.45
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Solution
The fourth proportional to 912,234,525.64, 1,258,977,474.05 and 555,027,661.45 is: 765,995,260.65
Step by Step Solution
- Step 1: Write the proportion equation
912,234,525.64 : 1,258,977,474.05 = 555,027,661.45 : x - Step 2: Convert to fraction form
912,234,525.64/1,258,977,474.05 = 555,027,661.45/x - Step 3: Cross multiply
912,234,525.64x = 1,258,977,474.05 × 555,027,661.45 - Step 4: Simplify right side
912,234,525.64x = 698,767,323,238,998,144 - Step 5: Solve for x
x = 698,767,323,238,998,144/912,234,525.64 - Step 6: Final answer
x = 765,995,260.65
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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.