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Finding the Fourth Proportional to 642,959.80, 964,075.20 and 243,613.60

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Solution

The fourth proportional to 642,959.80, 964,075.20 and 243,613.60 is: 365,282.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,959.80 : 964,075.20 = 243,613.60 : x
  2. Step 2: Convert to fraction form
    642,959.80/964,075.20 = 243,613.60/x
  3. Step 3: Cross multiply
    642,959.80x = 964,075.20 × 243,613.60
  4. Step 4: Simplify right side
    642,959.80x = 234,861,830,142.72
  5. Step 5: Solve for x
    x = 234,861,830,142.72/642,959.80
  6. Step 6: Final answer
    x = 365,282.29

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1.5x scale

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.