Finding the Fourth Proportional to 708,903,627.67, 978,217,078.99 and 391,343,252.41
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Solution
The fourth proportional to 708,903,627.67, 978,217,078.99 and 391,343,252.41 is: 540,015,085.71
Step by Step Solution
- Step 1: Write the proportion equation
708,903,627.67 : 978,217,078.99 = 391,343,252.41 : x - Step 2: Convert to fraction form
708,903,627.67/978,217,078.99 = 391,343,252.41/x - Step 3: Cross multiply
708,903,627.67x = 978,217,078.99 × 391,343,252.41 - Step 4: Simplify right side
708,903,627.67x = 382,818,653,254,956,480 - Step 5: Solve for x
x = 382,818,653,254,956,480/708,903,627.67 - Step 6: Final answer
x = 540,015,085.71
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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.