Finding the Fourth Proportional to 478,620,123.98, 660,495,772.36 and 258,603,549.98
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Solution
The fourth proportional to 478,620,123.98, 660,495,772.36 and 258,603,549.98 is: 356,872,899.65
Step by Step Solution
- Step 1: Write the proportion equation
478,620,123.98 : 660,495,772.36 = 258,603,549.98 : x - Step 2: Convert to fraction form
478,620,123.98/660,495,772.36 = 258,603,549.98/x - Step 3: Cross multiply
478,620,123.98x = 660,495,772.36 × 258,603,549.98 - Step 4: Simplify right side
478,620,123.98x = 170,806,551,475,128,960 - Step 5: Solve for x
x = 170,806,551,475,128,960/478,620,123.98 - Step 6: Final answer
x = 356,872,899.65
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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.