Home / 646,935.40-970,403.10-621,130.60

Finding the Fourth Proportional to 646,935.40, 970,403.10 and 621,130.60

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Solution

The fourth proportional to 646,935.40, 970,403.10 and 621,130.60 is: 931,695.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,935.40 : 970,403.10 = 621,130.60 : x
  2. Step 2: Convert to fraction form
    646,935.40/970,403.10 = 621,130.60/x
  3. Step 3: Cross multiply
    646,935.40x = 970,403.10 × 621,130.60
  4. Step 4: Simplify right side
    646,935.40x = 602,747,059,744.86
  5. Step 5: Solve for x
    x = 602,747,059,744.86/646,935.40
  6. Step 6: Final answer
    x = 931,695.90

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Double scale
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Similar ratio
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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.