Finding the Fourth Proportional to 663,435,679.74, 915,872,693.05 and 412,620,918.81
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Solution
The fourth proportional to 663,435,679.74, 915,872,693.05 and 412,620,918.81 is: 569,623,014.95
Step by Step Solution
- Step 1: Write the proportion equation
663,435,679.74 : 915,872,693.05 = 412,620,918.81 : x - Step 2: Convert to fraction form
663,435,679.74/915,872,693.05 = 412,620,918.81/x - Step 3: Cross multiply
663,435,679.74x = 915,872,693.05 × 412,620,918.81 - Step 4: Simplify right side
663,435,679.74x = 377,908,232,119,280,064 - Step 5: Solve for x
x = 377,908,232,119,280,064/663,435,679.74 - Step 6: Final answer
x = 569,623,014.95
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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.