Finding the Fourth Proportional to 921,345.81, 1,271,439.95 and 513,438.68
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Solution
The fourth proportional to 921,345.81, 1,271,439.95 and 513,438.68 is: 708,535.75
Step by Step Solution
- Step 1: Write the proportion equation
921,345.81 : 1,271,439.95 = 513,438.68 : x - Step 2: Convert to fraction form
921,345.81/1,271,439.95 = 513,438.68/x - Step 3: Cross multiply
921,345.81x = 1,271,439.95 × 513,438.68 - Step 4: Simplify right side
921,345.81x = 652,806,440,702.87 - Step 5: Solve for x
x = 652,806,440,702.87/921,345.81 - Step 6: Final answer
x = 708,535.75
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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.