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Finding the Fourth Proportional to 425,145.67, 586,742.42 and 317,528.84

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Solution

The fourth proportional to 425,145.67, 586,742.42 and 317,528.84 is: 438,220.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,145.67 : 586,742.42 = 317,528.84 : x
  2. Step 2: Convert to fraction form
    425,145.67/586,742.42 = 317,528.84/x
  3. Step 3: Cross multiply
    425,145.67x = 586,742.42 × 317,528.84
  4. Step 4: Simplify right side
    425,145.67x = 186,307,640,001.39
  5. Step 5: Solve for x
    x = 186,307,640,001.39/425,145.67
  6. Step 6: Final answer
    x = 438,220.72

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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.