Finding the Fourth Proportional to 1,398,319,323,311, 1,929,660,129,809.30 and 781,031,049,855.28
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Solution
The fourth proportional to 1,398,319,323,311, 1,929,660,129,809.30 and 781,031,049,855.28 is: 1,077,811,378,219.53
Step by Step Solution
- Step 1: Write the proportion equation
1,398,319,323,311 : 1,929,660,129,809.30 = 781,031,049,855.28 : x - Step 2: Convert to fraction form
1,398,319,323,311/1,929,660,129,809.30 = 781,031,049,855.28/x - Step 3: Cross multiply
1,398,319,323,311x = 1,929,660,129,809.30 × 781,031,049,855.28 - Step 4: Simplify right side
1,398,319,323,311x = 1,507,124,477,048,833,473,249,280 - Step 5: Solve for x
x = 1,507,124,477,048,833,473,249,280/1,398,319,323,311 - Step 6: Final answer
x = 1,077,811,378,219.53
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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.