Finding the Fourth Proportional to 388,513,776.34, 536,179,580.68 and 221,257,116.10
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Solution
The fourth proportional to 388,513,776.34, 536,179,580.68 and 221,257,116.10 is: 305,352,229.34
Step by Step Solution
- Step 1: Write the proportion equation
388,513,776.34 : 536,179,580.68 = 221,257,116.10 : x - Step 2: Convert to fraction form
388,513,776.34/536,179,580.68 = 221,257,116.10/x - Step 3: Cross multiply
388,513,776.34x = 536,179,580.68 × 221,257,116.10 - Step 4: Simplify right side
388,513,776.34x = 118,633,547,732,964,080 - Step 5: Solve for x
x = 118,633,547,732,964,080/388,513,776.34 - Step 6: Final answer
x = 305,352,229.34
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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.