Finding the Fourth Proportional to 661,508.99, 991,014.86 and 390,829.47
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Solution
The fourth proportional to 661,508.99, 991,014.86 and 390,829.47 is: 585,506.50
Step by Step Solution
- Step 1: Write the proportion equation
661,508.99 : 991,014.86 = 390,829.47 : x - Step 2: Convert to fraction form
661,508.99/991,014.86 = 390,829.47/x - Step 3: Cross multiply
661,508.99x = 991,014.86 × 390,829.47 - Step 4: Simplify right side
661,508.99x = 387,317,812,495.92 - Step 5: Solve for x
x = 387,317,812,495.92/661,508.99 - Step 6: Final answer
x = 585,506.50
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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.