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Finding the Fourth Proportional to 405,014.60, 607,521.90 and 286,819.40

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Solution

The fourth proportional to 405,014.60, 607,521.90 and 286,819.40 is: 430,229.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,014.60 : 607,521.90 = 286,819.40 : x
  2. Step 2: Convert to fraction form
    405,014.60/607,521.90 = 286,819.40/x
  3. Step 3: Cross multiply
    405,014.60x = 607,521.90 × 286,819.40
  4. Step 4: Simplify right side
    405,014.60x = 174,249,066,844.86
  5. Step 5: Solve for x
    x = 174,249,066,844.86/405,014.60
  6. Step 6: Final answer
    x = 430,229.10

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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.