Finding the Fourth Proportional to 717,704,119.84, 990,432,119.28 and 387,679,404.64
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Solution
The fourth proportional to 717,704,119.84, 990,432,119.28 and 387,679,404.64 is: 534,997,812.78
Step by Step Solution
- Step 1: Write the proportion equation
717,704,119.84 : 990,432,119.28 = 387,679,404.64 : x - Step 2: Convert to fraction form
717,704,119.84/990,432,119.28 = 387,679,404.64/x - Step 3: Cross multiply
717,704,119.84x = 990,432,119.28 × 387,679,404.64 - Step 4: Simplify right side
717,704,119.84x = 383,970,134,338,803,840 - Step 5: Solve for x
x = 383,970,134,338,803,840/717,704,119.84 - Step 6: Final answer
x = 534,997,812.78
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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.