Finding the Fourth Proportional to 639,987.78, 883,166.19 and 353,501.70
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Solution
The fourth proportional to 639,987.78, 883,166.19 and 353,501.70 is: 487,822.99
Step by Step Solution
- Step 1: Write the proportion equation
639,987.78 : 883,166.19 = 353,501.70 : x - Step 2: Convert to fraction form
639,987.78/883,166.19 = 353,501.70/x - Step 3: Cross multiply
639,987.78x = 883,166.19 × 353,501.70 - Step 4: Simplify right side
639,987.78x = 312,200,749,547.52 - Step 5: Solve for x
x = 312,200,749,547.52/639,987.78 - Step 6: Final answer
x = 487,822.99
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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.