Finding the Fourth Proportional to 390,671.52, 539,101.20 and 218,560.08
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Solution
The fourth proportional to 390,671.52, 539,101.20 and 218,560.08 is: 301,598.65
Step by Step Solution
- Step 1: Write the proportion equation
390,671.52 : 539,101.20 = 218,560.08 : x - Step 2: Convert to fraction form
390,671.52/539,101.20 = 218,560.08/x - Step 3: Cross multiply
390,671.52x = 539,101.20 × 218,560.08 - Step 4: Simplify right side
390,671.52x = 117,826,001,400.10 - Step 5: Solve for x
x = 117,826,001,400.10/390,671.52 - Step 6: Final answer
x = 301,598.65
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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.