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Finding the Fourth Proportional to 287,662.10, 432,011.55 and 278,330.90

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Solution

The fourth proportional to 287,662.10, 432,011.55 and 278,330.90 is: 417,997.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,662.10 : 432,011.55 = 278,330.90 : x
  2. Step 2: Convert to fraction form
    287,662.10/432,011.55 = 278,330.90/x
  3. Step 3: Cross multiply
    287,662.10x = 432,011.55 × 278,330.90
  4. Step 4: Simplify right side
    287,662.10x = 120,242,163,521.90
  5. Step 5: Solve for x
    x = 120,242,163,521.90/287,662.10
  6. Step 6: Final answer
    x = 417,997.93

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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.