Finding the Fourth Proportional to 578,721.60, 869,045.76 and 390,394.08
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Solution
The fourth proportional to 578,721.60, 869,045.76 and 390,394.08 is: 586,240.98
Step by Step Solution
- Step 1: Write the proportion equation
578,721.60 : 869,045.76 = 390,394.08 : x - Step 2: Convert to fraction form
578,721.60/869,045.76 = 390,394.08/x - Step 3: Cross multiply
578,721.60x = 869,045.76 × 390,394.08 - Step 4: Simplify right side
578,721.60x = 339,270,319,953.10 - Step 5: Solve for x
x = 339,270,319,953.10/578,721.60 - Step 6: Final answer
x = 586,240.98
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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.