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Finding the Fourth Proportional to 283,328.78, 390,994.14 and 156,004.74

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Solution

The fourth proportional to 283,328.78, 390,994.14 and 156,004.74 is: 215,286.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,328.78 : 390,994.14 = 156,004.74 : x
  2. Step 2: Convert to fraction form
    283,328.78/390,994.14 = 156,004.74/x
  3. Step 3: Cross multiply
    283,328.78x = 390,994.14 × 156,004.74
  4. Step 4: Simplify right side
    283,328.78x = 60,996,939,152.22
  5. Step 5: Solve for x
    x = 60,996,939,152.22/283,328.78
  6. Step 6: Final answer
    x = 215,286.77

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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.