Finding the Fourth Proportional to 390,790.12, 586,056.54 and 138,024.68
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Solution
The fourth proportional to 390,790.12, 586,056.54 and 138,024.68 is: 206,991.59
Step by Step Solution
- Step 1: Write the proportion equation
390,790.12 : 586,056.54 = 138,024.68 : x - Step 2: Convert to fraction form
390,790.12/586,056.54 = 138,024.68/x - Step 3: Cross multiply
390,790.12x = 586,056.54 × 138,024.68 - Step 4: Simplify right side
390,790.12x = 80,890,266,395.41 - Step 5: Solve for x
x = 80,890,266,395.41/390,790.12 - Step 6: Final answer
x = 206,991.59
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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.