Finding the Fourth Proportional to 1,128,431.24, 1,557,204.72 and 686,740.17
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Solution
The fourth proportional to 1,128,431.24, 1,557,204.72 and 686,740.17 is: 947,682.93
Step by Step Solution
- Step 1: Write the proportion equation
1,128,431.24 : 1,557,204.72 = 686,740.17 : x - Step 2: Convert to fraction form
1,128,431.24/1,557,204.72 = 686,740.17/x - Step 3: Cross multiply
1,128,431.24x = 1,557,204.72 × 686,740.17 - Step 4: Simplify right side
1,128,431.24x = 1,069,395,028,298.08 - Step 5: Solve for x
x = 1,069,395,028,298.08/1,128,431.24 - Step 6: Final answer
x = 947,682.93
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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.