Finding the Fourth Proportional to 280,739,089.32, 387,390,117.36 and 155,271,347.68
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Solution
The fourth proportional to 280,739,089.32, 387,390,117.36 and 155,271,347.68 is: 214,257,963.67
Step by Step Solution
- Step 1: Write the proportion equation
280,739,089.32 : 387,390,117.36 = 155,271,347.68 : x - Step 2: Convert to fraction form
280,739,089.32/387,390,117.36 = 155,271,347.68/x - Step 3: Cross multiply
280,739,089.32x = 387,390,117.36 × 155,271,347.68 - Step 4: Simplify right side
280,739,089.32x = 60,150,585,600,400,568 - Step 5: Solve for x
x = 60,150,585,600,400,568/280,739,089.32 - Step 6: Final answer
x = 214,257,963.67
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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.