Finding the Fourth Proportional to 712,608.18, 983,364.21 and 390,319.71
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Solution
The fourth proportional to 712,608.18, 983,364.21 and 390,319.71 is: 538,621.99
Step by Step Solution
- Step 1: Write the proportion equation
712,608.18 : 983,364.21 = 390,319.71 : x - Step 2: Convert to fraction form
712,608.18/983,364.21 = 390,319.71/x - Step 3: Cross multiply
712,608.18x = 983,364.21 × 390,319.71 - Step 4: Simplify right side
712,608.18x = 383,826,433,271.58 - Step 5: Solve for x
x = 383,826,433,271.58/712,608.18 - Step 6: Final answer
x = 538,621.99
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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.