Finding the Fourth Proportional to 989,862.19, 1,366,009.78 and 537,153.19
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Solution
The fourth proportional to 989,862.19, 1,366,009.78 and 537,153.19 is: 741,271.38
Step by Step Solution
- Step 1: Write the proportion equation
989,862.19 : 1,366,009.78 = 537,153.19 : x - Step 2: Convert to fraction form
989,862.19/1,366,009.78 = 537,153.19/x - Step 3: Cross multiply
989,862.19x = 1,366,009.78 × 537,153.19 - Step 4: Simplify right side
989,862.19x = 733,756,510,898.20 - Step 5: Solve for x
x = 733,756,510,898.20/989,862.19 - Step 6: Final answer
x = 741,271.38
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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.