Finding the Fourth Proportional to 309,639.70, 432,970.70 and 309,639.70
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Solution
The fourth proportional to 309,639.70, 432,970.70 and 309,639.70 is: 432,970.70
Step by Step Solution
- Step 1: Write the proportion equation
309,639.70 : 432,970.70 = 309,639.70 : x - Step 2: Convert to fraction form
309,639.70/432,970.70 = 309,639.70/x - Step 3: Cross multiply
309,639.70x = 432,970.70 × 309,639.70 - Step 4: Simplify right side
309,639.70x = 134,064,917,656.79 - Step 5: Solve for x
x = 134,064,917,656.79/309,639.70 - Step 6: Final answer
x = 432,970.70
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1.5x scale
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.