Finding the Fourth Proportional to 1,249,289,821.80, 1,724,020,117.50 and 692,408,821.32
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Solution
The fourth proportional to 1,249,289,821.80, 1,724,020,117.50 and 692,408,821.32 is: 955,524,263.99
Step by Step Solution
- Step 1: Write the proportion equation
1,249,289,821.80 : 1,724,020,117.50 = 692,408,821.32 : x - Step 2: Convert to fraction form
1,249,289,821.80/1,724,020,117.50 = 692,408,821.32/x - Step 3: Cross multiply
1,249,289,821.80x = 1,724,020,117.50 × 692,408,821.32 - Step 4: Simplify right side
1,249,289,821.80x = 1,193,726,737,490,142,976 - Step 5: Solve for x
x = 1,193,726,737,490,142,976/1,249,289,821.80 - Step 6: Final answer
x = 955,524,263.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.