Finding the Fourth Proportional to 688,639.70, 1,032,959.55 and 478,687.70
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Solution
The fourth proportional to 688,639.70, 1,032,959.55 and 478,687.70 is: 718,031.55
Step by Step Solution
- Step 1: Write the proportion equation
688,639.70 : 1,032,959.55 = 478,687.70 : x - Step 2: Convert to fraction form
688,639.70/1,032,959.55 = 478,687.70/x - Step 3: Cross multiply
688,639.70x = 1,032,959.55 × 478,687.70 - Step 4: Simplify right side
688,639.70x = 494,465,031,182.54 - Step 5: Solve for x
x = 494,465,031,182.54/688,639.70 - Step 6: Final answer
x = 718,031.55
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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.