Finding the Fourth Proportional to 707,887,440.99, 976,942,829.79 and 390,409,781.85
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Solution
The fourth proportional to 707,887,440.99, 976,942,829.79 and 390,409,781.85 is: 538,797,575.68
Step by Step Solution
- Step 1: Write the proportion equation
707,887,440.99 : 976,942,829.79 = 390,409,781.85 : x - Step 2: Convert to fraction form
707,887,440.99/976,942,829.79 = 390,409,781.85/x - Step 3: Cross multiply
707,887,440.99x = 976,942,829.79 × 390,409,781.85 - Step 4: Simplify right side
707,887,440.99x = 381,408,037,058,235,584 - Step 5: Solve for x
x = 381,408,037,058,235,584/707,887,440.99 - Step 6: Final answer
x = 538,797,575.68
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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.