Finding the Fourth Proportional to 688,356.57, 949,876.36 and 397,986.76
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Solution
The fourth proportional to 688,356.57, 949,876.36 and 397,986.76 is: 549,189.52
Step by Step Solution
- Step 1: Write the proportion equation
688,356.57 : 949,876.36 = 397,986.76 : x - Step 2: Convert to fraction form
688,356.57/949,876.36 = 397,986.76/x - Step 3: Cross multiply
688,356.57x = 949,876.36 × 397,986.76 - Step 4: Simplify right side
688,356.57x = 378,038,214,916.99 - Step 5: Solve for x
x = 378,038,214,916.99/688,356.57 - Step 6: Final answer
x = 549,189.52
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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.