Finding the Fourth Proportional to 910,236,789.93, 1,256,128,953.61 and 492,553,557.21
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Solution
The fourth proportional to 910,236,789.93, 1,256,128,953.61 and 492,553,557.21 is: 679,725,090.51
Step by Step Solution
- Step 1: Write the proportion equation
910,236,789.93 : 1,256,128,953.61 = 492,553,557.21 : x - Step 2: Convert to fraction form
910,236,789.93/1,256,128,953.61 = 492,553,557.21/x - Step 3: Cross multiply
910,236,789.93x = 1,256,128,953.61 × 492,553,557.21 - Step 4: Simplify right side
910,236,789.93x = 618,710,784,419,495,552 - Step 5: Solve for x
x = 618,710,784,419,495,552/910,236,789.93 - Step 6: Final answer
x = 679,725,090.51
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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.