Finding the Fourth Proportional to 790,566,217.90, 1,090,981,484.12 and 438,164,959.79
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Solution
The fourth proportional to 790,566,217.90, 1,090,981,484.12 and 438,164,959.79 is: 604,667,701.82
Step by Step Solution
- Step 1: Write the proportion equation
790,566,217.90 : 1,090,981,484.12 = 438,164,959.79 : x - Step 2: Convert to fraction form
790,566,217.90/1,090,981,484.12 = 438,164,959.79/x - Step 3: Cross multiply
790,566,217.90x = 1,090,981,484.12 × 438,164,959.79 - Step 4: Simplify right side
790,566,217.90x = 478,029,858,113,428,608 - Step 5: Solve for x
x = 478,029,858,113,428,608/790,566,217.90 - Step 6: Final answer
x = 604,667,701.82
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Double scale
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1.5x scale
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.