Finding the Fourth Proportional to 1,231,468,811.84, 1,699,426,421.98 and 666,953,721.99
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Solution
The fourth proportional to 1,231,468,811.84, 1,699,426,421.98 and 666,953,721.99 is: 920,395,844.77
Step by Step Solution
- Step 1: Write the proportion equation
1,231,468,811.84 : 1,699,426,421.98 = 666,953,721.99 : x - Step 2: Convert to fraction form
1,231,468,811.84/1,699,426,421.98 = 666,953,721.99/x - Step 3: Cross multiply
1,231,468,811.84x = 1,699,426,421.98 × 666,953,721.99 - Step 4: Simplify right side
1,231,468,811.84x = 1,133,438,777,386,041,984 - Step 5: Solve for x
x = 1,133,438,777,386,041,984/1,231,468,811.84 - Step 6: Final answer
x = 920,395,844.77
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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.