Finding the Fourth Proportional to 645,216.84, 890,394.30 and 358,734.42
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Solution
The fourth proportional to 645,216.84, 890,394.30 and 358,734.42 is: 495,050.75
Step by Step Solution
- Step 1: Write the proportion equation
645,216.84 : 890,394.30 = 358,734.42 : x - Step 2: Convert to fraction form
645,216.84/890,394.30 = 358,734.42/x - Step 3: Cross multiply
645,216.84x = 890,394.30 × 358,734.42 - Step 4: Simplify right side
645,216.84x = 319,415,082,781.81 - Step 5: Solve for x
x = 319,415,082,781.81/645,216.84 - Step 6: Final answer
x = 495,050.75
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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.