Home / 315,225.20-472,837.80-289,420.40

Finding the Fourth Proportional to 315,225.20, 472,837.80 and 289,420.40

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Solution

The fourth proportional to 315,225.20, 472,837.80 and 289,420.40 is: 434,130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,225.20 : 472,837.80 = 289,420.40 : x
  2. Step 2: Convert to fraction form
    315,225.20/472,837.80 = 289,420.40/x
  3. Step 3: Cross multiply
    315,225.20x = 472,837.80 × 289,420.40
  4. Step 4: Simplify right side
    315,225.20x = 136,848,905,211.12
  5. Step 5: Solve for x
    x = 136,848,905,211.12/315,225.20
  6. Step 6: Final answer
    x = 434,130.60

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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.