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Finding the Fourth Proportional to 810,000.40, 1,214,417.40 and 455,123.20

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Solution

The fourth proportional to 810,000.40, 1,214,417.40 and 455,123.20 is: 682,357.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,000.40 : 1,214,417.40 = 455,123.20 : x
  2. Step 2: Convert to fraction form
    810,000.40/1,214,417.40 = 455,123.20/x
  3. Step 3: Cross multiply
    810,000.40x = 1,214,417.40 × 455,123.20
  4. Step 4: Simplify right side
    810,000.40x = 552,709,533,223.68
  5. Step 5: Solve for x
    x = 552,709,533,223.68/810,000.40
  6. Step 6: Final answer
    x = 682,357.11

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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.