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Finding the Fourth Proportional to 315,002.96, 472,506.16 and 78,345.65

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Solution

The fourth proportional to 315,002.96, 472,506.16 and 78,345.65 is: 117,518.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,002.96 : 472,506.16 = 78,345.65 : x
  2. Step 2: Convert to fraction form
    315,002.96/472,506.16 = 78,345.65/x
  3. Step 3: Cross multiply
    315,002.96x = 472,506.16 × 78,345.65
  4. Step 4: Simplify right side
    315,002.96x = 37,018,799,675.81
  5. Step 5: Solve for x
    x = 37,018,799,675.81/315,002.96
  6. Step 6: Final answer
    x = 117,518.89

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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.