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Finding the Fourth Proportional to 260,030.40, 390,337.20 and 201,127.20

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Solution

The fourth proportional to 260,030.40, 390,337.20 and 201,127.20 is: 301,916.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,030.40 : 390,337.20 = 201,127.20 : x
  2. Step 2: Convert to fraction form
    260,030.40/390,337.20 = 201,127.20/x
  3. Step 3: Cross multiply
    260,030.40x = 390,337.20 × 201,127.20
  4. Step 4: Simplify right side
    260,030.40x = 78,507,428,091.84
  5. Step 5: Solve for x
    x = 78,507,428,091.84/260,030.40
  6. Step 6: Final answer
    x = 301,916.35

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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.