Finding the Fourth Proportional to 716,962.81, 989,421.26 and 390,285.21
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Solution
The fourth proportional to 716,962.81, 989,421.26 and 390,285.21 is: 538,600.45
Step by Step Solution
- Step 1: Write the proportion equation
716,962.81 : 989,421.26 = 390,285.21 : x - Step 2: Convert to fraction form
716,962.81/989,421.26 = 390,285.21/x - Step 3: Cross multiply
716,962.81x = 989,421.26 × 390,285.21 - Step 4: Simplify right side
716,962.81x = 386,156,488,191.82 - Step 5: Solve for x
x = 386,156,488,191.82/716,962.81 - Step 6: Final answer
x = 538,600.45
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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.