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Finding the Fourth Proportional to 806,980.40, 1,211,345.40 and 507,798.80

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Solution

The fourth proportional to 806,980.40, 1,211,345.40 and 507,798.80 is: 762,248.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,980.40 : 1,211,345.40 = 507,798.80 : x
  2. Step 2: Convert to fraction form
    806,980.40/1,211,345.40 = 507,798.80/x
  3. Step 3: Cross multiply
    806,980.40x = 1,211,345.40 × 507,798.80
  4. Step 4: Simplify right side
    806,980.40x = 615,119,740,505.52
  5. Step 5: Solve for x
    x = 615,119,740,505.52/806,980.40
  6. Step 6: Final answer
    x = 762,248.67

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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.