Finding the Fourth Proportional to 430,897,708.65, 646,437,350.81 and 139,742,128.69
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Solution
The fourth proportional to 430,897,708.65, 646,437,350.81 and 139,742,128.69 is: 209,642,635.95
Step by Step Solution
- Step 1: Write the proportion equation
430,897,708.65 : 646,437,350.81 = 139,742,128.69 : x - Step 2: Convert to fraction form
430,897,708.65/646,437,350.81 = 139,742,128.69/x - Step 3: Cross multiply
430,897,708.65x = 646,437,350.81 × 139,742,128.69 - Step 4: Simplify right side
430,897,708.65x = 90,334,531,467,078,624 - Step 5: Solve for x
x = 90,334,531,467,078,624/430,897,708.65 - Step 6: Final answer
x = 209,642,635.95
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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.