Finding the Fourth Proportional to 668,306.84, 921,964.58 and 396,386.19
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Solution
The fourth proportional to 668,306.84, 921,964.58 and 396,386.19 is: 546,835.69
Step by Step Solution
- Step 1: Write the proportion equation
668,306.84 : 921,964.58 = 396,386.19 : x - Step 2: Convert to fraction form
668,306.84/921,964.58 = 396,386.19/x - Step 3: Cross multiply
668,306.84x = 921,964.58 × 396,386.19 - Step 4: Simplify right side
668,306.84x = 365,454,026,685.67 - Step 5: Solve for x
x = 365,454,026,685.67/668,306.84 - Step 6: Final answer
x = 546,835.69
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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.