Finding the Fourth Proportional to 970,620,652.80, 1,455,930,979.20 and 644,103,302.40
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Solution
The fourth proportional to 970,620,652.80, 1,455,930,979.20 and 644,103,302.40 is: 966,154,953.60
Step by Step Solution
- Step 1: Write the proportion equation
970,620,652.80 : 1,455,930,979.20 = 644,103,302.40 : x - Step 2: Convert to fraction form
970,620,652.80/1,455,930,979.20 = 644,103,302.40/x - Step 3: Cross multiply
970,620,652.80x = 1,455,930,979.20 × 644,103,302.40 - Step 4: Simplify right side
970,620,652.80x = 937,769,951,769,185,664 - Step 5: Solve for x
x = 937,769,951,769,185,664/970,620,652.80 - Step 6: Final answer
x = 966,154,953.60
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Double scale
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Similar ratio
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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.