Finding the Fourth Proportional to 428,875,931.60, 643,313,897.40 and 357,450,261.20
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Solution
The fourth proportional to 428,875,931.60, 643,313,897.40 and 357,450,261.20 is: 536,175,391.80
Step by Step Solution
- Step 1: Write the proportion equation
428,875,931.60 : 643,313,897.40 = 357,450,261.20 : x - Step 2: Convert to fraction form
428,875,931.60/643,313,897.40 = 357,450,261.20/x - Step 3: Cross multiply
428,875,931.60x = 643,313,897.40 × 357,450,261.20 - Step 4: Simplify right side
428,875,931.60x = 229,952,720,659,220,000 - Step 5: Solve for x
x = 229,952,720,659,220,000/428,875,931.60 - Step 6: Final answer
x = 536,175,391.80
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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.