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Finding the Fourth Proportional to 405,103.60, 607,655.40 and 286,908.40

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Solution

The fourth proportional to 405,103.60, 607,655.40 and 286,908.40 is: 430,362.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,103.60 : 607,655.40 = 286,908.40 : x
  2. Step 2: Convert to fraction form
    405,103.60/607,655.40 = 286,908.40/x
  3. Step 3: Cross multiply
    405,103.60x = 607,655.40 × 286,908.40
  4. Step 4: Simplify right side
    405,103.60x = 174,341,438,565.36
  5. Step 5: Solve for x
    x = 174,341,438,565.36/405,103.60
  6. Step 6: Final answer
    x = 430,362.60

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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.