Finding the Fourth Proportional to 390,831,230.90, 586,265,699.66 and 128,509,974.06
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Solution
The fourth proportional to 390,831,230.90, 586,265,699.66 and 128,509,974.06 is: 192,771,160.28
Step by Step Solution
- Step 1: Write the proportion equation
390,831,230.90 : 586,265,699.66 = 128,509,974.06 : x - Step 2: Convert to fraction form
390,831,230.90/586,265,699.66 = 128,509,974.06/x - Step 3: Cross multiply
390,831,230.90x = 586,265,699.66 × 128,509,974.06 - Step 4: Simplify right side
390,831,230.90x = 75,340,989,855,574,352 - Step 5: Solve for x
x = 75,340,989,855,574,352/390,831,230.90 - Step 6: Final answer
x = 192,771,160.28
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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.