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Finding the Fourth Proportional to 415,028.80, 623,126.40 and 257,564.80

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Solution

The fourth proportional to 415,028.80, 623,126.40 and 257,564.80 is: 386,709.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,028.80 : 623,126.40 = 257,564.80 : x
  2. Step 2: Convert to fraction form
    415,028.80/623,126.40 = 257,564.80/x
  3. Step 3: Cross multiply
    415,028.80x = 623,126.40 × 257,564.80
  4. Step 4: Simplify right side
    415,028.80x = 160,495,426,590.72
  5. Step 5: Solve for x
    x = 160,495,426,590.72/415,028.80
  6. Step 6: Final answer
    x = 386,709.13

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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.