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Finding the Fourth Proportional to 283,117.60, 390,686.05 and 155,793.20

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Solution

The fourth proportional to 283,117.60, 390,686.05 and 155,793.20 is: 214,985.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,117.60 : 390,686.05 = 155,793.20 : x
  2. Step 2: Convert to fraction form
    283,117.60/390,686.05 = 155,793.20/x
  3. Step 3: Cross multiply
    283,117.60x = 390,686.05 × 155,793.20
  4. Step 4: Simplify right side
    283,117.60x = 60,866,228,166.17
  5. Step 5: Solve for x
    x = 60,866,228,166.17/283,117.60
  6. Step 6: Final answer
    x = 214,985.67

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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.