Finding the Fourth Proportional to 716,961.68, 989,419.71 and 390,284.09
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Solution
The fourth proportional to 716,961.68, 989,419.71 and 390,284.09 is: 538,598.89
Step by Step Solution
- Step 1: Write the proportion equation
716,961.68 : 989,419.71 = 390,284.09 : x - Step 2: Convert to fraction form
716,961.68/989,419.71 = 390,284.09/x - Step 3: Cross multiply
716,961.68x = 989,419.71 × 390,284.09 - Step 4: Simplify right side
716,961.68x = 386,154,769,176.86 - Step 5: Solve for x
x = 386,154,769,176.86/716,961.68 - Step 6: Final answer
x = 538,598.89
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.