Finding the Fourth Proportional to 1,405,233,337.68, 1,939,233,488.04 and 778,712,230.80
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Solution
The fourth proportional to 1,405,233,337.68, 1,939,233,488.04 and 778,712,230.80 is: 1,074,629,241.30
Step by Step Solution
- Step 1: Write the proportion equation
1,405,233,337.68 : 1,939,233,488.04 = 778,712,230.80 : x - Step 2: Convert to fraction form
1,405,233,337.68/1,939,233,488.04 = 778,712,230.80/x - Step 3: Cross multiply
1,405,233,337.68x = 1,939,233,488.04 × 778,712,230.80 - Step 4: Simplify right side
1,405,233,337.68x = 1,510,104,835,513,693,440 - Step 5: Solve for x
x = 1,510,104,835,513,693,440/1,405,233,337.68 - Step 6: Final answer
x = 1,074,629,241.30
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1.5x scale
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.