Finding the Fourth Proportional to 865,613.70, 1,298,420.55 and 492,365.70
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Solution
The fourth proportional to 865,613.70, 1,298,420.55 and 492,365.70 is: 738,548.55
Step by Step Solution
- Step 1: Write the proportion equation
865,613.70 : 1,298,420.55 = 492,365.70 : x - Step 2: Convert to fraction form
865,613.70/1,298,420.55 = 492,365.70/x - Step 3: Cross multiply
865,613.70x = 1,298,420.55 × 492,365.70 - Step 4: Simplify right side
865,613.70x = 639,297,742,995.14 - Step 5: Solve for x
x = 639,297,742,995.14/865,613.70 - Step 6: Final answer
x = 738,548.55
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.