Finding the Fourth Proportional to 430,733,968.80, 646,195,431.60 and 212,488,864.80
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Solution
The fourth proportional to 430,733,968.80, 646,195,431.60 and 212,488,864.80 is: 318,779,905.11
Step by Step Solution
- Step 1: Write the proportion equation
430,733,968.80 : 646,195,431.60 = 212,488,864.80 : x - Step 2: Convert to fraction form
430,733,968.80/646,195,431.60 = 212,488,864.80/x - Step 3: Cross multiply
430,733,968.80x = 646,195,431.60 × 212,488,864.80 - Step 4: Simplify right side
430,733,968.80x = 137,309,333,699,630,064 - Step 5: Solve for x
x = 137,309,333,699,630,064/430,733,968.80 - Step 6: Final answer
x = 318,779,905.11
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1.5x scale
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.