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Finding the Fourth Proportional to 235,420.30, 353,130.45 and 218,140.30

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Solution

The fourth proportional to 235,420.30, 353,130.45 and 218,140.30 is: 327,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,420.30 : 353,130.45 = 218,140.30 : x
  2. Step 2: Convert to fraction form
    235,420.30/353,130.45 = 218,140.30/x
  3. Step 3: Cross multiply
    235,420.30x = 353,130.45 × 218,140.30
  4. Step 4: Simplify right side
    235,420.30x = 77,031,982,302.14
  5. Step 5: Solve for x
    x = 77,031,982,302.14/235,420.30
  6. Step 6: Final answer
    x = 327,210.45

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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.