Finding the Fourth Proportional to 915,129,539.58, 1,245,983,799.09 and 912,223,885.92
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Solution
The fourth proportional to 915,129,539.58, 1,245,983,799.09 and 912,223,885.92 is: 1,242,027,640.72
Step by Step Solution
- Step 1: Write the proportion equation
915,129,539.58 : 1,245,983,799.09 = 912,223,885.92 : x - Step 2: Convert to fraction form
915,129,539.58/1,245,983,799.09 = 912,223,885.92/x - Step 3: Cross multiply
915,129,539.58x = 1,245,983,799.09 × 912,223,885.92 - Step 4: Simplify right side
915,129,539.58x = 1,136,616,182,999,244,288 - Step 5: Solve for x
x = 1,136,616,182,999,244,288/915,129,539.58 - Step 6: Final answer
x = 1,242,027,640.72
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.