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Finding the Fourth Proportional to 810,813.12, 1,119,019.44 and 471,281.40

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Solution

The fourth proportional to 810,813.12, 1,119,019.44 and 471,281.40 is: 650,424.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,813.12 : 1,119,019.44 = 471,281.40 : x
  2. Step 2: Convert to fraction form
    810,813.12/1,119,019.44 = 471,281.40/x
  3. Step 3: Cross multiply
    810,813.12x = 1,119,019.44 × 471,281.40
  4. Step 4: Simplify right side
    810,813.12x = 527,373,048,310.42
  5. Step 5: Solve for x
    x = 527,373,048,310.42/810,813.12
  6. Step 6: Final answer
    x = 650,424.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.