Finding the Fourth Proportional to 879,211.68, 1,213,312.80 and 476,803.68
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Solution
The fourth proportional to 879,211.68, 1,213,312.80 and 476,803.68 is: 657,989.45
Step by Step Solution
- Step 1: Write the proportion equation
879,211.68 : 1,213,312.80 = 476,803.68 : x - Step 2: Convert to fraction form
879,211.68/1,213,312.80 = 476,803.68/x - Step 3: Cross multiply
879,211.68x = 1,213,312.80 × 476,803.68 - Step 4: Simplify right side
879,211.68x = 578,512,008,031.10 - Step 5: Solve for x
x = 578,512,008,031.10/879,211.68 - Step 6: Final answer
x = 657,989.45
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1.5x scale
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.