Finding the Fourth Proportional to 696,913.20, 961,681.80 and 390,946.80
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Solution
The fourth proportional to 696,913.20, 961,681.80 and 390,946.80 is: 539,473.81
Step by Step Solution
- Step 1: Write the proportion equation
696,913.20 : 961,681.80 = 390,946.80 : x - Step 2: Convert to fraction form
696,913.20/961,681.80 = 390,946.80/x - Step 3: Cross multiply
696,913.20x = 961,681.80 × 390,946.80 - Step 4: Simplify right side
696,913.20x = 375,966,422,328.24 - Step 5: Solve for x
x = 375,966,422,328.24/696,913.20 - Step 6: Final answer
x = 539,473.81
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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.