Finding the Fourth Proportional to 1,438,312.35, 2,155,951.70 and 478,510.88
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Solution
The fourth proportional to 1,438,312.35, 2,155,951.70 and 478,510.88 is: 717,261.69
Step by Step Solution
- Step 1: Write the proportion equation
1,438,312.35 : 2,155,951.70 = 478,510.88 : x - Step 2: Convert to fraction form
1,438,312.35/2,155,951.70 = 478,510.88/x - Step 3: Cross multiply
1,438,312.35x = 2,155,951.70 × 478,510.88 - Step 4: Simplify right side
1,438,312.35x = 1,031,646,342,811.94 - Step 5: Solve for x
x = 1,031,646,342,811.94/1,438,312.35 - Step 6: Final answer
x = 717,261.69
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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.