Finding the Fourth Proportional to 420,088,648.68, 630,231,949.62 and 143,742,871.62
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Solution
The fourth proportional to 420,088,648.68, 630,231,949.62 and 143,742,871.62 is: 215,648,174.52
Step by Step Solution
- Step 1: Write the proportion equation
420,088,648.68 : 630,231,949.62 = 143,742,871.62 : x - Step 2: Convert to fraction form
420,088,648.68/630,231,949.62 = 143,742,871.62/x - Step 3: Cross multiply
420,088,648.68x = 630,231,949.62 × 143,742,871.62 - Step 4: Simplify right side
420,088,648.68x = 90,591,350,225,049,968 - Step 5: Solve for x
x = 90,591,350,225,049,968/420,088,648.68 - Step 6: Final answer
x = 215,648,174.52
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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.