Finding the Fourth Proportional to 991,679,165.70, 1,487,518,748.55 and 931,212,989.70
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Solution
The fourth proportional to 991,679,165.70, 1,487,518,748.55 and 931,212,989.70 is: 1,396,819,484.55
Step by Step Solution
- Step 1: Write the proportion equation
991,679,165.70 : 1,487,518,748.55 = 931,212,989.70 : x - Step 2: Convert to fraction form
991,679,165.70/1,487,518,748.55 = 931,212,989.70/x - Step 3: Cross multiply
991,679,165.70x = 1,487,518,748.55 × 931,212,989.70 - Step 4: Simplify right side
991,679,165.70x = 1,385,196,781,072,048,128 - Step 5: Solve for x
x = 1,385,196,781,072,048,128/991,679,165.70 - Step 6: Final answer
x = 1,396,819,484.55
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1.5x scale
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.