Finding the Fourth Proportional to 390,681.09, 586,203.93 and 138,152.82
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Solution
The fourth proportional to 390,681.09, 586,203.93 and 138,152.82 is: 207,293.69
Step by Step Solution
- Step 1: Write the proportion equation
390,681.09 : 586,203.93 = 138,152.82 : x - Step 2: Convert to fraction form
390,681.09/586,203.93 = 138,152.82/x - Step 3: Cross multiply
390,681.09x = 586,203.93 × 138,152.82 - Step 4: Simplify right side
390,681.09x = 80,985,726,024.58 - Step 5: Solve for x
x = 80,985,726,024.58/390,681.09 - Step 6: Final answer
x = 207,293.69
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.