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Finding the Fourth Proportional to 309,718.16, 427,370.13 and 173,746.89

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Solution

The fourth proportional to 309,718.16, 427,370.13 and 173,746.89 is: 239,747.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,718.16 : 427,370.13 = 173,746.89 : x
  2. Step 2: Convert to fraction form
    309,718.16/427,370.13 = 173,746.89/x
  3. Step 3: Cross multiply
    309,718.16x = 427,370.13 × 173,746.89
  4. Step 4: Simplify right side
    309,718.16x = 74,254,230,966.40
  5. Step 5: Solve for x
    x = 74,254,230,966.40/309,718.16
  6. Step 6: Final answer
    x = 239,747.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.