Finding the Fourth Proportional to 1,398,768,190.84, 1,931,171,248.74 and 890,417,734.12
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Solution
The fourth proportional to 1,398,768,190.84, 1,931,171,248.74 and 890,417,734.12 is: 1,229,331,020.51
Step by Step Solution
- Step 1: Write the proportion equation
1,398,768,190.84 : 1,931,171,248.74 = 890,417,734.12 : x - Step 2: Convert to fraction form
1,398,768,190.84/1,931,171,248.74 = 890,417,734.12/x - Step 3: Cross multiply
1,398,768,190.84x = 1,931,171,248.74 × 890,417,734.12 - Step 4: Simplify right side
1,398,768,190.84x = 1,719,549,127,500,761,600 - Step 5: Solve for x
x = 1,719,549,127,500,761,600/1,398,768,190.84 - Step 6: Final answer
x = 1,229,331,020.51
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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.