Finding the Fourth Proportional to 1,987,538.41, 2,742,885.43 and 1,128,178.63
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Solution
The fourth proportional to 1,987,538.41, 2,742,885.43 and 1,128,178.63 is: 1,556,933.30
Step by Step Solution
- Step 1: Write the proportion equation
1,987,538.41 : 2,742,885.43 = 1,128,178.63 : x - Step 2: Convert to fraction form
1,987,538.41/2,742,885.43 = 1,128,178.63/x - Step 3: Cross multiply
1,987,538.41x = 2,742,885.43 × 1,128,178.63 - Step 4: Simplify right side
1,987,538.41x = 3,094,464,733,618.53 - Step 5: Solve for x
x = 3,094,464,733,618.53/1,987,538.41 - Step 6: Final answer
x = 1,556,933.30
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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.