Finding the Fourth Proportional to 390,800.80, 586,201.20 and 257,831.20
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Solution
The fourth proportional to 390,800.80, 586,201.20 and 257,831.20 is: 386,746.80
Step by Step Solution
- Step 1: Write the proportion equation
390,800.80 : 586,201.20 = 257,831.20 : x - Step 2: Convert to fraction form
390,800.80/586,201.20 = 257,831.20/x - Step 3: Cross multiply
390,800.80x = 586,201.20 × 257,831.20 - Step 4: Simplify right side
390,800.80x = 151,140,958,837.44 - Step 5: Solve for x
x = 151,140,958,837.44/390,800.80 - Step 6: Final answer
x = 386,746.80
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1.5x scale
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.