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Finding the Fourth Proportional to 553,289.60, 763,529.60 and 311,571.20

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Solution

The fourth proportional to 553,289.60, 763,529.60 and 311,571.20 is: 429,962.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,289.60 : 763,529.60 = 311,571.20 : x
  2. Step 2: Convert to fraction form
    553,289.60/763,529.60 = 311,571.20/x
  3. Step 3: Cross multiply
    553,289.60x = 763,529.60 × 311,571.20
  4. Step 4: Simplify right side
    553,289.60x = 237,893,833,707.52
  5. Step 5: Solve for x
    x = 237,893,833,707.52/553,289.60
  6. Step 6: Final answer
    x = 429,962.60

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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.