Finding the Fourth Proportional to 257,410,656.80, 386,115,985.20 and 136,478,304.80
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Solution
The fourth proportional to 257,410,656.80, 386,115,985.20 and 136,478,304.80 is: 204,717,457.20
Step by Step Solution
- Step 1: Write the proportion equation
257,410,656.80 : 386,115,985.20 = 136,478,304.80 : x - Step 2: Convert to fraction form
257,410,656.80/386,115,985.20 = 136,478,304.80/x - Step 3: Cross multiply
257,410,656.80x = 386,115,985.20 × 136,478,304.80 - Step 4: Simplify right side
257,410,656.80x = 52,696,455,116,277,888 - Step 5: Solve for x
x = 52,696,455,116,277,888/257,410,656.80 - Step 6: Final answer
x = 204,717,457.20
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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.