Finding the Fourth Proportional to 390,988.42, 539,549.28 and 221,226.18
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Solution
The fourth proportional to 390,988.42, 539,549.28 and 221,226.18 is: 305,283.79
Step by Step Solution
- Step 1: Write the proportion equation
390,988.42 : 539,549.28 = 221,226.18 : x - Step 2: Convert to fraction form
390,988.42/539,549.28 = 221,226.18/x - Step 3: Cross multiply
390,988.42x = 539,549.28 × 221,226.18 - Step 4: Simplify right side
390,988.42x = 119,362,426,136.15 - Step 5: Solve for x
x = 119,362,426,136.15/390,988.42 - Step 6: Final answer
x = 305,283.79
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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.