Finding the Fourth Proportional to 390,622,895.42, 539,060,129.49 and 212,006,786.49
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Solution
The fourth proportional to 390,622,895.42, 539,060,129.49 and 212,006,786.49 is: 292,569,655.07
Step by Step Solution
- Step 1: Write the proportion equation
390,622,895.42 : 539,060,129.49 = 212,006,786.49 : x - Step 2: Convert to fraction form
390,622,895.42/539,060,129.49 = 212,006,786.49/x - Step 3: Cross multiply
390,622,895.42x = 539,060,129.49 × 212,006,786.49 - Step 4: Simplify right side
390,622,895.42x = 114,284,405,778,058,192 - Step 5: Solve for x
x = 114,284,405,778,058,192/390,622,895.42 - Step 6: Final answer
x = 292,569,655.07
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.