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Finding the Fourth Proportional to 663,120.80, 994,681.20 and 572,919.20

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Solution

The fourth proportional to 663,120.80, 994,681.20 and 572,919.20 is: 859,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,120.80 : 994,681.20 = 572,919.20 : x
  2. Step 2: Convert to fraction form
    663,120.80/994,681.20 = 572,919.20/x
  3. Step 3: Cross multiply
    663,120.80x = 994,681.20 × 572,919.20
  4. Step 4: Simplify right side
    663,120.80x = 569,871,957,359.04
  5. Step 5: Solve for x
    x = 569,871,957,359.04/663,120.80
  6. Step 6: Final answer
    x = 859,378.80

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Double scale
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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.