Finding the Fourth Proportional to 7,319,923.80, 10,979,885.70 and 5,430,355.80
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Solution
The fourth proportional to 7,319,923.80, 10,979,885.70 and 5,430,355.80 is: 8,145,533.70
Step by Step Solution
- Step 1: Write the proportion equation
7,319,923.80 : 10,979,885.70 = 5,430,355.80 : x - Step 2: Convert to fraction form
7,319,923.80/10,979,885.70 = 5,430,355.80/x - Step 3: Cross multiply
7,319,923.80x = 10,979,885.70 × 5,430,355.80 - Step 4: Simplify right side
7,319,923.80x = 59,624,685,994,332.05 - Step 5: Solve for x
x = 59,624,685,994,332.05/7,319,923.80 - Step 6: Final answer
x = 8,145,533.70
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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.