Finding the Fourth Proportional to 426,547,749.70, 639,821,624.55 and 392,955,429.70
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Solution
The fourth proportional to 426,547,749.70, 639,821,624.55 and 392,955,429.70 is: 589,433,144.55
Step by Step Solution
- Step 1: Write the proportion equation
426,547,749.70 : 639,821,624.55 = 392,955,429.70 : x - Step 2: Convert to fraction form
426,547,749.70/639,821,624.55 = 392,955,429.70/x - Step 3: Cross multiply
426,547,749.70x = 639,821,624.55 × 392,955,429.70 - Step 4: Simplify right side
426,547,749.70x = 251,421,381,406,397,280 - Step 5: Solve for x
x = 251,421,381,406,397,280/426,547,749.70 - Step 6: Final answer
x = 589,433,144.55
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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.