Home / 651,037.20-976,555.80-429,421.20

Finding the Fourth Proportional to 651,037.20, 976,555.80 and 429,421.20

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Solution

The fourth proportional to 651,037.20, 976,555.80 and 429,421.20 is: 644,131.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,037.20 : 976,555.80 = 429,421.20 : x
  2. Step 2: Convert to fraction form
    651,037.20/976,555.80 = 429,421.20/x
  3. Step 3: Cross multiply
    651,037.20x = 976,555.80 × 429,421.20
  4. Step 4: Simplify right side
    651,037.20x = 419,353,763,502.96
  5. Step 5: Solve for x
    x = 419,353,763,502.96/651,037.20
  6. Step 6: Final answer
    x = 644,131.80

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Half scale
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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.