Finding the Fourth Proportional to 910,979,599.32, 1,257,157,817.28 and 493,291,905.12
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Solution
The fourth proportional to 910,979,599.32, 1,257,157,817.28 and 493,291,905.12 is: 680,746,061.92
Step by Step Solution
- Step 1: Write the proportion equation
910,979,599.32 : 1,257,157,817.28 = 493,291,905.12 : x - Step 2: Convert to fraction form
910,979,599.32/1,257,157,817.28 = 493,291,905.12/x - Step 3: Cross multiply
910,979,599.32x = 1,257,157,817.28 × 493,291,905.12 - Step 4: Simplify right side
910,979,599.32x = 620,145,774,722,552,064 - Step 5: Solve for x
x = 620,145,774,722,552,064/910,979,599.32 - Step 6: Final answer
x = 680,746,061.92
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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.