Finding the Fourth Proportional to 915,128,117.10, 1,262,877,615.37 and 497,440,402.40
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Solution
The fourth proportional to 915,128,117.10, 1,262,877,615.37 and 497,440,402.40 is: 686,468,197.66
Step by Step Solution
- Step 1: Write the proportion equation
915,128,117.10 : 1,262,877,615.37 = 497,440,402.40 : x - Step 2: Convert to fraction form
915,128,117.10/1,262,877,615.37 = 497,440,402.40/x - Step 3: Cross multiply
915,128,117.10x = 1,262,877,615.37 × 497,440,402.40 - Step 4: Simplify right side
915,128,117.10x = 628,206,349,175,359,360 - Step 5: Solve for x
x = 628,206,349,175,359,360/915,128,117.10 - Step 6: Final answer
x = 686,468,197.66
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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.