Finding the Fourth Proportional to 910,236,785.47, 1,256,128,947.44 and 492,553,552.75
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Solution
The fourth proportional to 910,236,785.47, 1,256,128,947.44 and 492,553,552.75 is: 679,725,084.34
Step by Step Solution
- Step 1: Write the proportion equation
910,236,785.47 : 1,256,128,947.44 = 492,553,552.75 : x - Step 2: Convert to fraction form
910,236,785.47/1,256,128,947.44 = 492,553,552.75/x - Step 3: Cross multiply
910,236,785.47x = 1,256,128,947.44 × 492,553,552.75 - Step 4: Simplify right side
910,236,785.47x = 618,710,775,773,689,984 - Step 5: Solve for x
x = 618,710,775,773,689,984/910,236,785.47 - Step 6: Final answer
x = 679,725,084.34
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Double scale
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1.5x scale
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.