Home / 318,869.72-478,332.12-82,210.40

Finding the Fourth Proportional to 318,869.72, 478,332.12 and 82,210.40

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Solution

The fourth proportional to 318,869.72, 478,332.12 and 82,210.40 is: 123,322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,869.72 : 478,332.12 = 82,210.40 : x
  2. Step 2: Convert to fraction form
    318,869.72/478,332.12 = 82,210.40/x
  3. Step 3: Cross multiply
    318,869.72x = 478,332.12 × 82,210.40
  4. Step 4: Simplify right side
    318,869.72x = 39,323,874,918.05
  5. Step 5: Solve for x
    x = 39,323,874,918.05/318,869.72
  6. Step 6: Final answer
    x = 123,322.70

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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.