Finding the Fourth Proportional to 712,631.04, 983,430.99 and 390,352.68
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Solution
The fourth proportional to 712,631.04, 983,430.99 and 390,352.68 is: 538,686.78
Step by Step Solution
- Step 1: Write the proportion equation
712,631.04 : 983,430.99 = 390,352.68 : x - Step 2: Convert to fraction form
712,631.04/983,430.99 = 390,352.68/x - Step 3: Cross multiply
712,631.04x = 983,430.99 × 390,352.68 - Step 4: Simplify right side
712,631.04x = 383,884,922,541.55 - Step 5: Solve for x
x = 383,884,922,541.55/712,631.04 - Step 6: Final answer
x = 538,686.78
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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.