Finding the Fourth Proportional to 811,999,332.78, 1,120,559,908.54 and 440,721,440.70
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Solution
The fourth proportional to 811,999,332.78, 1,120,559,908.54 and 440,721,440.70 is: 608,196,038.28
Step by Step Solution
- Step 1: Write the proportion equation
811,999,332.78 : 1,120,559,908.54 = 440,721,440.70 : x - Step 2: Convert to fraction form
811,999,332.78/1,120,559,908.54 = 440,721,440.70/x - Step 3: Cross multiply
811,999,332.78x = 1,120,559,908.54 × 440,721,440.70 - Step 4: Simplify right side
811,999,332.78x = 493,854,777,280,709,440 - Step 5: Solve for x
x = 493,854,777,280,709,440/811,999,332.78 - Step 6: Final answer
x = 608,196,038.28
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1.5x scale
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.