Finding the Fourth Proportional to 712,627.47, 983,449.86 and 390,355.71
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Solution
The fourth proportional to 712,627.47, 983,449.86 and 390,355.71 is: 538,703.99
Step by Step Solution
- Step 1: Write the proportion equation
712,627.47 : 983,449.86 = 390,355.71 : x - Step 2: Convert to fraction form
712,627.47/983,449.86 = 390,355.71/x - Step 3: Cross multiply
712,627.47x = 983,449.86 × 390,355.71 - Step 4: Simplify right side
712,627.47x = 383,895,263,197.93 - Step 5: Solve for x
x = 383,895,263,197.93/712,627.47 - Step 6: Final answer
x = 538,703.99
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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.