Finding the Fourth Proportional to 1,405.99, 2,108.87 and 432
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Solution
The fourth proportional to 1,405.99, 2,108.87 and 432 is: 647.96
Step by Step Solution
- Step 1: Write the proportion equation
1,405.99 : 2,108.87 = 432 : x - Step 2: Convert to fraction form
1,405.99/2,108.87 = 432/x - Step 3: Cross multiply
1,405.99x = 2,108.87 × 432 - Step 4: Simplify right side
1,405.99x = 911,031.30 - Step 5: Solve for x
x = 911,031.30/1,405.99 - Step 6: Final answer
x = 647.96
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.