Finding the Fourth Proportional to 319,909.32, 438,273.73 and 307,947.08
Calculator
Solution
The fourth proportional to 319,909.32, 438,273.73 and 307,947.08 is: 421,885.54
Step by Step Solution
- Step 1: Write the proportion equation
319,909.32 : 438,273.73 = 307,947.08 : x - Step 2: Convert to fraction form
319,909.32/438,273.73 = 307,947.08/x - Step 3: Cross multiply
319,909.32x = 438,273.73 × 307,947.08 - Step 4: Simplify right side
319,909.32x = 134,965,115,394.21 - Step 5: Solve for x
x = 134,965,115,394.21/319,909.32 - Step 6: Final answer
x = 421,885.54
Related Problems
Find fourth proportional to 159,954.66, 219,136.87 and 153,973.54
Half scale
Find fourth proportional to 639,818.64, 876,547.46 and 615,894.16
Double scale
Find fourth proportional to 319,910.32, 438,275.10 and 307,948.08
Similar ratio
Find fourth proportional to 479,863.98, 657,410.60 and 461,920.62
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.