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Finding the Fourth Proportional to 368,875.20, 553,312.80 and 191,728.20

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Solution

The fourth proportional to 368,875.20, 553,312.80 and 191,728.20 is: 287,592.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,875.20 : 553,312.80 = 191,728.20 : x
  2. Step 2: Convert to fraction form
    368,875.20/553,312.80 = 191,728.20/x
  3. Step 3: Cross multiply
    368,875.20x = 553,312.80 × 191,728.20
  4. Step 4: Simplify right side
    368,875.20x = 106,085,667,180.96
  5. Step 5: Solve for x
    x = 106,085,667,180.96/368,875.20
  6. Step 6: Final answer
    x = 287,592.30

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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.