Finding the Fourth Proportional to 657,201.20, 906,937.28 and 355,395.20
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Solution
The fourth proportional to 657,201.20, 906,937.28 and 355,395.20 is: 490,445.17
Step by Step Solution
- Step 1: Write the proportion equation
657,201.20 : 906,937.28 = 355,395.20 : x - Step 2: Convert to fraction form
657,201.20/906,937.28 = 355,395.20/x - Step 3: Cross multiply
657,201.20x = 906,937.28 × 355,395.20 - Step 4: Simplify right side
657,201.20x = 322,321,156,013.06 - Step 5: Solve for x
x = 322,321,156,013.06/657,201.20 - Step 6: Final answer
x = 490,445.17
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.