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Finding the Fourth Proportional to 651,434.60, 977,151.90 and 427,485.80

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Solution

The fourth proportional to 651,434.60, 977,151.90 and 427,485.80 is: 641,228.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,434.60 : 977,151.90 = 427,485.80 : x
  2. Step 2: Convert to fraction form
    651,434.60/977,151.90 = 427,485.80/x
  3. Step 3: Cross multiply
    651,434.60x = 977,151.90 × 427,485.80
  4. Step 4: Simplify right side
    651,434.60x = 417,718,561,693.02
  5. Step 5: Solve for x
    x = 417,718,561,693.02/651,434.60
  6. Step 6: Final answer
    x = 641,228.70

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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.