Finding the Fourth Proportional to 420,723,683.69, 631,153,338.93 and 129,590,671.06
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Solution
The fourth proportional to 420,723,683.69, 631,153,338.93 and 129,590,671.06 is: 194,406,894.37
Step by Step Solution
- Step 1: Write the proportion equation
420,723,683.69 : 631,153,338.93 = 129,590,671.06 : x - Step 2: Convert to fraction form
420,723,683.69/631,153,338.93 = 129,590,671.06/x - Step 3: Cross multiply
420,723,683.69x = 631,153,338.93 × 129,590,671.06 - Step 4: Simplify right side
420,723,683.69x = 81,791,584,734,487,264 - Step 5: Solve for x
x = 81,791,584,734,487,264/420,723,683.69 - Step 6: Final answer
x = 194,406,894.37
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.