Finding the Fourth Proportional to 278,112,340.80, 390,163,492.80 and 278,112,340.80
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Solution
The fourth proportional to 278,112,340.80, 390,163,492.80 and 278,112,340.80 is: 390,163,492.80
Step by Step Solution
- Step 1: Write the proportion equation
278,112,340.80 : 390,163,492.80 = 278,112,340.80 : x - Step 2: Convert to fraction form
278,112,340.80/390,163,492.80 = 278,112,340.80/x - Step 3: Cross multiply
278,112,340.80x = 390,163,492.80 × 278,112,340.80 - Step 4: Simplify right side
278,112,340.80x = 108,509,282,277,311,952 - Step 5: Solve for x
x = 108,509,282,277,311,952/278,112,340.80 - Step 6: Final answer
x = 390,163,492.80
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.