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Finding the Fourth Proportional to 604,130.40, 905,158.80 and 287,906.40

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Solution

The fourth proportional to 604,130.40, 905,158.80 and 287,906.40 is: 431,365.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,130.40 : 905,158.80 = 287,906.40 : x
  2. Step 2: Convert to fraction form
    604,130.40/905,158.80 = 287,906.40/x
  3. Step 3: Cross multiply
    604,130.40x = 905,158.80 × 287,906.40
  4. Step 4: Simplify right side
    604,130.40x = 260,601,011,536.32
  5. Step 5: Solve for x
    x = 260,601,011,536.32/604,130.40
  6. Step 6: Final answer
    x = 431,365.50

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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.