Finding the Fourth Proportional to 1,007,934,528.12, 1,390,878,621.68 and 561,878,160.68
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Solution
The fourth proportional to 1,007,934,528.12, 1,390,878,621.68 and 561,878,160.68 is: 775,352,267.30
Step by Step Solution
- Step 1: Write the proportion equation
1,007,934,528.12 : 1,390,878,621.68 = 561,878,160.68 : x - Step 2: Convert to fraction form
1,007,934,528.12/1,390,878,621.68 = 561,878,160.68/x - Step 3: Cross multiply
1,007,934,528.12x = 1,390,878,621.68 × 561,878,160.68 - Step 4: Simplify right side
1,007,934,528.12x = 781,504,321,668,928,128 - Step 5: Solve for x
x = 781,504,321,668,928,128/1,007,934,528.12 - Step 6: Final answer
x = 775,352,267.30
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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.