Finding the Fourth Proportional to 1,387,058,537.31, 2,080,587,765.75 and 639,853,235.40
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Solution
The fourth proportional to 1,387,058,537.31, 2,080,587,765.75 and 639,853,235.40 is: 959,779,834.55
Step by Step Solution
- Step 1: Write the proportion equation
1,387,058,537.31 : 2,080,587,765.75 = 639,853,235.40 : x - Step 2: Convert to fraction form
1,387,058,537.31/2,080,587,765.75 = 639,853,235.40/x - Step 3: Cross multiply
1,387,058,537.31x = 2,080,587,765.75 × 639,853,235.40 - Step 4: Simplify right side
1,387,058,537.31x = 1,331,270,813,448,794,880 - Step 5: Solve for x
x = 1,331,270,813,448,794,880/1,387,058,537.31 - Step 6: Final answer
x = 959,779,834.55
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.