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Finding the Fourth Proportional to 617,930.20, 926,895.30 and 428,973.40

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Solution

The fourth proportional to 617,930.20, 926,895.30 and 428,973.40 is: 643,460.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,930.20 : 926,895.30 = 428,973.40 : x
  2. Step 2: Convert to fraction form
    617,930.20/926,895.30 = 428,973.40/x
  3. Step 3: Cross multiply
    617,930.20x = 926,895.30 × 428,973.40
  4. Step 4: Simplify right side
    617,930.20x = 397,613,428,285.02
  5. Step 5: Solve for x
    x = 397,613,428,285.02/617,930.20
  6. Step 6: Final answer
    x = 643,460.10

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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.