Finding the Fourth Proportional to 390,903.14, 539,447.37 and 212,055.14
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Solution
The fourth proportional to 390,903.14, 539,447.37 and 212,055.14 is: 292,636.66
Step by Step Solution
- Step 1: Write the proportion equation
390,903.14 : 539,447.37 = 212,055.14 : x - Step 2: Convert to fraction form
390,903.14/539,447.37 = 212,055.14/x - Step 3: Cross multiply
390,903.14x = 539,447.37 × 212,055.14 - Step 4: Simplify right side
390,903.14x = 114,392,587,567.98 - Step 5: Solve for x
x = 114,392,587,567.98/390,903.14 - Step 6: Final answer
x = 292,636.66
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1.5x scale
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.