Finding the Fourth Proportional to 645,539.16, 891,031.60 and 430,678.68
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Solution
The fourth proportional to 645,539.16, 891,031.60 and 430,678.68 is: 594,461.71
Step by Step Solution
- Step 1: Write the proportion equation
645,539.16 : 891,031.60 = 430,678.68 : x - Step 2: Convert to fraction form
645,539.16/891,031.60 = 430,678.68/x - Step 3: Cross multiply
645,539.16x = 891,031.60 × 430,678.68 - Step 4: Simplify right side
645,539.16x = 383,748,313,326.29 - Step 5: Solve for x
x = 383,748,313,326.29/645,539.16 - Step 6: Final answer
x = 594,461.71
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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.