Finding the Fourth Proportional to 1,211,472,854.60, 1,817,209,281.90 and 921,235,209.80
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Solution
The fourth proportional to 1,211,472,854.60, 1,817,209,281.90 and 921,235,209.80 is: 1,381,852,814.70
Step by Step Solution
- Step 1: Write the proportion equation
1,211,472,854.60 : 1,817,209,281.90 = 921,235,209.80 : x - Step 2: Convert to fraction form
1,211,472,854.60/1,817,209,281.90 = 921,235,209.80/x - Step 3: Cross multiply
1,211,472,854.60x = 1,817,209,281.90 × 921,235,209.80 - Step 4: Simplify right side
1,211,472,854.60x = 1,674,077,174,061,653,760 - Step 5: Solve for x
x = 1,674,077,174,061,653,760/1,211,472,854.60 - Step 6: Final answer
x = 1,381,852,814.70
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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.