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Finding the Fourth Proportional to 282,856.68, 390,344.40 and 155,534.40

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Solution

The fourth proportional to 282,856.68, 390,344.40 and 155,534.40 is: 214,638.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,856.68 : 390,344.40 = 155,534.40 : x
  2. Step 2: Convert to fraction form
    282,856.68/390,344.40 = 155,534.40/x
  3. Step 3: Cross multiply
    282,856.68x = 390,344.40 × 155,534.40
  4. Step 4: Simplify right side
    282,856.68x = 60,711,982,047.36
  5. Step 5: Solve for x
    x = 60,711,982,047.36/282,856.68
  6. Step 6: Final answer
    x = 214,638.67

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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.