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Finding the Fourth Proportional to 423,040.80, 634,561.20 and 404,378.40

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Solution

The fourth proportional to 423,040.80, 634,561.20 and 404,378.40 is: 606,567.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,040.80 : 634,561.20 = 404,378.40 : x
  2. Step 2: Convert to fraction form
    423,040.80/634,561.20 = 404,378.40/x
  3. Step 3: Cross multiply
    423,040.80x = 634,561.20 × 404,378.40
  4. Step 4: Simplify right side
    423,040.80x = 256,602,842,758.08
  5. Step 5: Solve for x
    x = 256,602,842,758.08/423,040.80
  6. Step 6: Final answer
    x = 606,567.60

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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.