Finding the Fourth Proportional to 430,897,709.40, 646,437,351.94 and 139,742,129.44
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Solution
The fourth proportional to 430,897,709.40, 646,437,351.94 and 139,742,129.44 is: 209,642,637.07
Step by Step Solution
- Step 1: Write the proportion equation
430,897,709.40 : 646,437,351.94 = 139,742,129.44 : x - Step 2: Convert to fraction form
430,897,709.40/646,437,351.94 = 139,742,129.44/x - Step 3: Cross multiply
430,897,709.40x = 646,437,351.94 × 139,742,129.44 - Step 4: Simplify right side
430,897,709.40x = 90,334,532,107,684,864 - Step 5: Solve for x
x = 90,334,532,107,684,864/430,897,709.40 - Step 6: Final answer
x = 209,642,637.07
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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.