Finding the Fourth Proportional to 712,789.47, 983,649.42 and 390,510.99
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Solution
The fourth proportional to 712,789.47, 983,649.42 and 390,510.99 is: 538,905.14
Step by Step Solution
- Step 1: Write the proportion equation
712,789.47 : 983,649.42 = 390,510.99 : x - Step 2: Convert to fraction form
712,789.47/983,649.42 = 390,510.99/x - Step 3: Cross multiply
712,789.47x = 983,649.42 × 390,510.99 - Step 4: Simplify right side
712,789.47x = 384,125,908,817.13 - Step 5: Solve for x
x = 384,125,908,817.13/712,789.47 - Step 6: Final answer
x = 538,905.14
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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.