Finding the Fourth Proportional to 430,897,720.68, 646,437,368.76 and 139,742,140.68
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Solution
The fourth proportional to 430,897,720.68, 646,437,368.76 and 139,742,140.68 is: 209,642,653.91
Step by Step Solution
- Step 1: Write the proportion equation
430,897,720.68 : 646,437,368.76 = 139,742,140.68 : x - Step 2: Convert to fraction form
430,897,720.68/646,437,368.76 = 139,742,140.68/x - Step 3: Cross multiply
430,897,720.68x = 646,437,368.76 × 139,742,140.68 - Step 4: Simplify right side
430,897,720.68x = 90,334,541,726,068,960 - Step 5: Solve for x
x = 90,334,541,726,068,960/430,897,720.68 - Step 6: Final answer
x = 209,642,653.91
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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.