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Finding the Fourth Proportional to 400,672.12, 553,302.75 and 257,681.20

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Solution

The fourth proportional to 400,672.12, 553,302.75 and 257,681.20 is: 355,841.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,672.12 : 553,302.75 = 257,681.20 : x
  2. Step 2: Convert to fraction form
    400,672.12/553,302.75 = 257,681.20/x
  3. Step 3: Cross multiply
    400,672.12x = 553,302.75 × 257,681.20
  4. Step 4: Simplify right side
    400,672.12x = 142,575,716,583.30
  5. Step 5: Solve for x
    x = 142,575,716,583.30/400,672.12
  6. Step 6: Final answer
    x = 355,841.37

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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.