Finding the Fourth Proportional to 390,905,181.54, 586,429,857.46 and 128,604,495.06
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Solution
The fourth proportional to 390,905,181.54, 586,429,857.46 and 128,604,495.06 is: 192,930,457.99
Step by Step Solution
- Step 1: Write the proportion equation
390,905,181.54 : 586,429,857.46 = 128,604,495.06 : x - Step 2: Convert to fraction form
390,905,181.54/586,429,857.46 = 128,604,495.06/x - Step 3: Cross multiply
390,905,181.54x = 586,429,857.46 × 128,604,495.06 - Step 4: Simplify right side
390,905,181.54x = 75,417,515,706,751,088 - Step 5: Solve for x
x = 75,417,515,706,751,088/390,905,181.54 - Step 6: Final answer
x = 192,930,457.99
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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.