Finding the Fourth Proportional to 1,128,605.34, 1,557,454.74 and 638,569.62
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Solution
The fourth proportional to 1,128,605.34, 1,557,454.74 and 638,569.62 is: 881,214.40
Step by Step Solution
- Step 1: Write the proportion equation
1,128,605.34 : 1,557,454.74 = 638,569.62 : x - Step 2: Convert to fraction form
1,128,605.34/1,557,454.74 = 638,569.62/x - Step 3: Cross multiply
1,128,605.34x = 1,557,454.74 × 638,569.62 - Step 4: Simplify right side
1,128,605.34x = 994,543,281,489.00 - Step 5: Solve for x
x = 994,543,281,489.00/1,128,605.34 - Step 6: Final answer
x = 881,214.40
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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.