Finding the Fourth Proportional to 812,679.13, 1,121,430.65 and 463,817.82
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Solution
The fourth proportional to 812,679.13, 1,121,430.65 and 463,817.82 is: 640,030.61
Step by Step Solution
- Step 1: Write the proportion equation
812,679.13 : 1,121,430.65 = 463,817.82 : x - Step 2: Convert to fraction form
812,679.13/1,121,430.65 = 463,817.82/x - Step 3: Cross multiply
812,679.13x = 1,121,430.65 × 463,817.82 - Step 4: Simplify right side
812,679.13x = 520,139,519,364.18 - Step 5: Solve for x
x = 520,139,519,364.18/812,679.13 - Step 6: Final answer
x = 640,030.61
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1.5x scale
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.