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Finding the Fourth Proportional to 817,762.78, 1,225,368.78 and 517,609.30

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Solution

The fourth proportional to 817,762.78, 1,225,368.78 and 517,609.30 is: 775,606.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,762.78 : 1,225,368.78 = 517,609.30 : x
  2. Step 2: Convert to fraction form
    817,762.78/1,225,368.78 = 517,609.30/x
  3. Step 3: Cross multiply
    817,762.78x = 1,225,368.78 × 517,609.30
  4. Step 4: Simplify right side
    817,762.78x = 634,262,276,457.65
  5. Step 5: Solve for x
    x = 634,262,276,457.65/817,762.78
  6. Step 6: Final answer
    x = 775,606.68

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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.