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Finding the Fourth Proportional to 387,355.20, 579,477.60 and 335,342.40

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Solution

The fourth proportional to 387,355.20, 579,477.60 and 335,342.40 is: 501,667.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,355.20 : 579,477.60 = 335,342.40 : x
  2. Step 2: Convert to fraction form
    387,355.20/579,477.60 = 335,342.40/x
  3. Step 3: Cross multiply
    387,355.20x = 579,477.60 × 335,342.40
  4. Step 4: Simplify right side
    387,355.20x = 194,323,409,130.24
  5. Step 5: Solve for x
    x = 194,323,409,130.24/387,355.20
  6. Step 6: Final answer
    x = 501,667.23

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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.