Finding the Fourth Proportional to 1,247,536,915.47, 1,721,060,526.84 and 752,224,455.63
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Solution
The fourth proportional to 1,247,536,915.47, 1,721,060,526.84 and 752,224,455.63 is: 1,037,743,895.07
Step by Step Solution
- Step 1: Write the proportion equation
1,247,536,915.47 : 1,721,060,526.84 = 752,224,455.63 : x - Step 2: Convert to fraction form
1,247,536,915.47/1,721,060,526.84 = 752,224,455.63/x - Step 3: Cross multiply
1,247,536,915.47x = 1,721,060,526.84 × 752,224,455.63 - Step 4: Simplify right side
1,247,536,915.47x = 1,294,623,817,908,499,968 - Step 5: Solve for x
x = 1,294,623,817,908,499,968/1,247,536,915.47 - Step 6: Final answer
x = 1,037,743,895.07
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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.