Finding the Fourth Proportional to 778,553.10, 1,074,219.57 and 438,955.74
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Solution
The fourth proportional to 778,553.10, 1,074,219.57 and 438,955.74 is: 605,655.34
Step by Step Solution
- Step 1: Write the proportion equation
778,553.10 : 1,074,219.57 = 438,955.74 : x - Step 2: Convert to fraction form
778,553.10/1,074,219.57 = 438,955.74/x - Step 3: Cross multiply
778,553.10x = 1,074,219.57 × 438,955.74 - Step 4: Simplify right side
778,553.10x = 471,534,846,271.83 - Step 5: Solve for x
x = 471,534,846,271.83/778,553.10 - Step 6: Final answer
x = 605,655.34
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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.