Finding the Fourth Proportional to 390,136,221.68, 585,334,421.98 and 259,493,533.88
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Solution
The fourth proportional to 390,136,221.68, 585,334,421.98 and 259,493,533.88 is: 389,326,827.96
Step by Step Solution
- Step 1: Write the proportion equation
390,136,221.68 : 585,334,421.98 = 259,493,533.88 : x - Step 2: Convert to fraction form
390,136,221.68/585,334,421.98 = 259,493,533.88/x - Step 3: Cross multiply
390,136,221.68x = 585,334,421.98 × 259,493,533.88 - Step 4: Simplify right side
390,136,221.68x = 151,890,497,657,621,920 - Step 5: Solve for x
x = 151,890,497,657,621,920/390,136,221.68 - Step 6: Final answer
x = 389,326,827.96
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.