Finding the Fourth Proportional to 553,219.68, 763,403.76 and 311,515.68
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Solution
The fourth proportional to 553,219.68, 763,403.76 and 311,515.68 is: 429,869.45
Step by Step Solution
- Step 1: Write the proportion equation
553,219.68 : 763,403.76 = 311,515.68 : x - Step 2: Convert to fraction form
553,219.68/763,403.76 = 311,515.68/x - Step 3: Cross multiply
553,219.68x = 763,403.76 × 311,515.68 - Step 4: Simplify right side
553,219.68x = 237,812,241,410.96 - Step 5: Solve for x
x = 237,812,241,410.96/553,219.68 - Step 6: Final answer
x = 429,869.45
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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.