Finding the Fourth Proportional to 390,830,968.46, 586,265,306.36 and 128,509,711.62
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Solution
The fourth proportional to 390,830,968.46, 586,265,306.36 and 128,509,711.62 is: 192,770,766.73
Step by Step Solution
- Step 1: Write the proportion equation
390,830,968.46 : 586,265,306.36 = 128,509,711.62 : x - Step 2: Convert to fraction form
390,830,968.46/586,265,306.36 = 128,509,711.62/x - Step 3: Cross multiply
390,830,968.46x = 586,265,306.36 × 128,509,711.62 - Step 4: Simplify right side
390,830,968.46x = 75,340,785,453,134,560 - Step 5: Solve for x
x = 75,340,785,453,134,560/390,830,968.46 - Step 6: Final answer
x = 192,770,766.73
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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.