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Finding the Fourth Proportional to 315,011.32, 472,472.73 and 90,390.89

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Solution

The fourth proportional to 315,011.32, 472,472.73 and 90,390.89 is: 135,573.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,011.32 : 472,472.73 = 90,390.89 : x
  2. Step 2: Convert to fraction form
    315,011.32/472,472.73 = 90,390.89/x
  3. Step 3: Cross multiply
    315,011.32x = 472,472.73 × 90,390.89
  4. Step 4: Simplify right side
    315,011.32x = 42,707,231,746.61
  5. Step 5: Solve for x
    x = 42,707,231,746.61/315,011.32
  6. Step 6: Final answer
    x = 135,573.64

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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.