Finding the Fourth Proportional to 1,208,953,863.10, 1,813,430,794.65 and 442,949,434.30
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Solution
The fourth proportional to 1,208,953,863.10, 1,813,430,794.65 and 442,949,434.30 is: 664,424,151.45
Step by Step Solution
- Step 1: Write the proportion equation
1,208,953,863.10 : 1,813,430,794.65 = 442,949,434.30 : x - Step 2: Convert to fraction form
1,208,953,863.10/1,813,430,794.65 = 442,949,434.30/x - Step 3: Cross multiply
1,208,953,863.10x = 1,813,430,794.65 × 442,949,434.30 - Step 4: Simplify right side
1,208,953,863.10x = 803,258,144,632,417,024 - Step 5: Solve for x
x = 803,258,144,632,417,024/1,208,953,863.10 - Step 6: Final answer
x = 664,424,151.45
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Double scale
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Similar ratio
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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.