Finding the Fourth Proportional to 986,898,194.30, 1,480,347,291.45 and 831,929,998.70
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Solution
The fourth proportional to 986,898,194.30, 1,480,347,291.45 and 831,929,998.70 is: 1,247,894,998.05
Step by Step Solution
- Step 1: Write the proportion equation
986,898,194.30 : 1,480,347,291.45 = 831,929,998.70 : x - Step 2: Convert to fraction form
986,898,194.30/1,480,347,291.45 = 831,929,998.70/x - Step 3: Cross multiply
986,898,194.30x = 1,480,347,291.45 × 831,929,998.70 - Step 4: Simplify right side
986,898,194.30x = 1,231,545,320,251,547,136 - Step 5: Solve for x
x = 1,231,545,320,251,547,136/986,898,194.30 - Step 6: Final answer
x = 1,247,894,998.05
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Double scale
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.