Finding the Fourth Proportional to 688,132.58, 949,240.18 and 639,421.26
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Solution
The fourth proportional to 688,132.58, 949,240.18 and 639,421.26 is: 882,045.65
Step by Step Solution
- Step 1: Write the proportion equation
688,132.58 : 949,240.18 = 639,421.26 : x - Step 2: Convert to fraction form
688,132.58/949,240.18 = 639,421.26/x - Step 3: Cross multiply
688,132.58x = 949,240.18 × 639,421.26 - Step 4: Simplify right side
688,132.58x = 606,964,349,177.85 - Step 5: Solve for x
x = 606,964,349,177.85/688,132.58 - Step 6: Final answer
x = 882,045.65
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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.