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Finding the Fourth Proportional to 283,070.76, 390,643.60 and 155,746.60

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Solution

The fourth proportional to 283,070.76, 390,643.60 and 155,746.60 is: 214,933.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,070.76 : 390,643.60 = 155,746.60 : x
  2. Step 2: Convert to fraction form
    283,070.76/390,643.60 = 155,746.60/x
  3. Step 3: Cross multiply
    283,070.76x = 390,643.60 × 155,746.60
  4. Step 4: Simplify right side
    283,070.76x = 60,841,412,511.76
  5. Step 5: Solve for x
    x = 60,841,412,511.76/283,070.76
  6. Step 6: Final answer
    x = 214,933.58

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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.