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Finding the Fourth Proportional to 572,417.60, 789,896.64 and 317,748.80

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Solution

The fourth proportional to 572,417.60, 789,896.64 and 317,748.80 is: 438,471.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,417.60 : 789,896.64 = 317,748.80 : x
  2. Step 2: Convert to fraction form
    572,417.60/789,896.64 = 317,748.80/x
  3. Step 3: Cross multiply
    572,417.60x = 789,896.64 × 317,748.80
  4. Step 4: Simplify right side
    572,417.60x = 250,988,709,484.03
  5. Step 5: Solve for x
    x = 250,988,709,484.03/572,417.60
  6. Step 6: Final answer
    x = 438,471.34

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Double scale
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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.