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Finding the Fourth Proportional to 419,432.80, 627,920.40 and 370,280.80

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Solution

The fourth proportional to 419,432.80, 627,920.40 and 370,280.80 is: 554,336.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,432.80 : 627,920.40 = 370,280.80 : x
  2. Step 2: Convert to fraction form
    419,432.80/627,920.40 = 370,280.80/x
  3. Step 3: Cross multiply
    419,432.80x = 627,920.40 × 370,280.80
  4. Step 4: Simplify right side
    419,432.80x = 232,506,868,048.32
  5. Step 5: Solve for x
    x = 232,506,868,048.32/419,432.80
  6. Step 6: Final answer
    x = 554,336.40

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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.