Finding the Fourth Proportional to 390,901.14, 539,444.61 and 212,053.14
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Solution
The fourth proportional to 390,901.14, 539,444.61 and 212,053.14 is: 292,633.90
Step by Step Solution
- Step 1: Write the proportion equation
390,901.14 : 539,444.61 = 212,053.14 : x - Step 2: Convert to fraction form
390,901.14/539,444.61 = 212,053.14/x - Step 3: Cross multiply
390,901.14x = 539,444.61 × 212,053.14 - Step 4: Simplify right side
390,901.14x = 114,390,923,406.58 - Step 5: Solve for x
x = 114,390,923,406.58/390,901.14 - Step 6: Final answer
x = 292,633.90
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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.