Finding the Fourth Proportional to 385,364,378.71, 531,803,355.76 and 209,152,374.06
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Solution
The fourth proportional to 385,364,378.71, 531,803,355.76 and 209,152,374.06 is: 288,630,554.70
Step by Step Solution
- Step 1: Write the proportion equation
385,364,378.71 : 531,803,355.76 = 209,152,374.06 : x - Step 2: Convert to fraction form
385,364,378.71/531,803,355.76 = 209,152,374.06/x - Step 3: Cross multiply
385,364,378.71x = 531,803,355.76 × 209,152,374.06 - Step 4: Simplify right side
385,364,378.71x = 111,227,934,390,278,768 - Step 5: Solve for x
x = 111,227,934,390,278,768/385,364,378.71 - Step 6: Final answer
x = 288,630,554.70
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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.