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Finding the Fourth Proportional to 282,809.32, 390,277.86 and 155,492.92

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Solution

The fourth proportional to 282,809.32, 390,277.86 and 155,492.92 is: 214,580.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,809.32 : 390,277.86 = 155,492.92 : x
  2. Step 2: Convert to fraction form
    282,809.32/390,277.86 = 155,492.92/x
  3. Step 3: Cross multiply
    282,809.32x = 390,277.86 × 155,492.92
  4. Step 4: Simplify right side
    282,809.32x = 60,685,444,062.75
  5. Step 5: Solve for x
    x = 60,685,444,062.75/282,809.32
  6. Step 6: Final answer
    x = 214,580.78

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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.