Finding the Fourth Proportional to 390,813.75, 539,322.99 and 221,044.23
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Solution
The fourth proportional to 390,813.75, 539,322.99 and 221,044.23 is: 305,041.05
Step by Step Solution
- Step 1: Write the proportion equation
390,813.75 : 539,322.99 = 221,044.23 : x - Step 2: Convert to fraction form
390,813.75/539,322.99 = 221,044.23/x - Step 3: Cross multiply
390,813.75x = 539,322.99 × 221,044.23 - Step 4: Simplify right side
390,813.75x = 119,214,235,045.85 - Step 5: Solve for x
x = 119,214,235,045.85/390,813.75 - Step 6: Final answer
x = 305,041.05
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.