Finding the Fourth Proportional to 390,726.16, 539,224.70 and 218,642.62
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Solution
The fourth proportional to 390,726.16, 539,224.70 and 218,642.62 is: 301,739.46
Step by Step Solution
- Step 1: Write the proportion equation
390,726.16 : 539,224.70 = 218,642.62 : x - Step 2: Convert to fraction form
390,726.16/539,224.70 = 218,642.62/x - Step 3: Cross multiply
390,726.16x = 539,224.70 × 218,642.62 - Step 4: Simplify right side
390,726.16x = 117,897,501,176.71 - Step 5: Solve for x
x = 117,897,501,176.71/390,726.16 - Step 6: Final answer
x = 301,739.46
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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.