Home / 642,740.20-963,188.70-472,935.40

Finding the Fourth Proportional to 642,740.20, 963,188.70 and 472,935.40

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Solution

The fourth proportional to 642,740.20, 963,188.70 and 472,935.40 is: 708,724.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,740.20 : 963,188.70 = 472,935.40 : x
  2. Step 2: Convert to fraction form
    642,740.20/963,188.70 = 472,935.40/x
  3. Step 3: Cross multiply
    642,740.20x = 963,188.70 × 472,935.40
  4. Step 4: Simplify right side
    642,740.20x = 455,526,033,109.98
  5. Step 5: Solve for x
    x = 455,526,033,109.98/642,740.20
  6. Step 6: Final answer
    x = 708,724.98

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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.