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Finding the Fourth Proportional to 651,070.80, 976,606.20 and 427,851

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Solution

The fourth proportional to 651,070.80, 976,606.20 and 427,851 is: 641,776.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,070.80 : 976,606.20 = 427,851 : x
  2. Step 2: Convert to fraction form
    651,070.80/976,606.20 = 427,851/x
  3. Step 3: Cross multiply
    651,070.80x = 976,606.20 × 427,851
  4. Step 4: Simplify right side
    651,070.80x = 417,841,939,276.20
  5. Step 5: Solve for x
    x = 417,841,939,276.20/651,070.80
  6. Step 6: Final answer
    x = 641,776.50

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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.