Finding the Fourth Proportional to 1,138,622,801.79, 1,708,167,148.28 and 391,541,547.54
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Solution
The fourth proportional to 1,138,622,801.79, 1,708,167,148.28 and 391,541,547.54 is: 587,392,424.99
Step by Step Solution
- Step 1: Write the proportion equation
1,138,622,801.79 : 1,708,167,148.28 = 391,541,547.54 : x - Step 2: Convert to fraction form
1,138,622,801.79/1,708,167,148.28 = 391,541,547.54/x - Step 3: Cross multiply
1,138,622,801.79x = 1,708,167,148.28 × 391,541,547.54 - Step 4: Simplify right side
1,138,622,801.79x = 668,818,408,692,582,272 - Step 5: Solve for x
x = 668,818,408,692,582,272/1,138,622,801.79 - Step 6: Final answer
x = 587,392,424.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.