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Finding the Fourth Proportional to 459,908.55, 689,973.12 and 144,365.49

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Solution

The fourth proportional to 459,908.55, 689,973.12 and 144,365.49 is: 216,582.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,908.55 : 689,973.12 = 144,365.49 : x
  2. Step 2: Convert to fraction form
    459,908.55/689,973.12 = 144,365.49/x
  3. Step 3: Cross multiply
    459,908.55x = 689,973.12 × 144,365.49
  4. Step 4: Simplify right side
    459,908.55x = 99,608,307,555.63
  5. Step 5: Solve for x
    x = 99,608,307,555.63/459,908.55
  6. Step 6: Final answer
    x = 216,582.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.