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Finding the Fourth Proportional to 459,693.60, 689,929.20 and 207,362.40

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Solution

The fourth proportional to 459,693.60, 689,929.20 and 207,362.40 is: 311,218.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,693.60 : 689,929.20 = 207,362.40 : x
  2. Step 2: Convert to fraction form
    459,693.60/689,929.20 = 207,362.40/x
  3. Step 3: Cross multiply
    459,693.60x = 689,929.20 × 207,362.40
  4. Step 4: Simplify right side
    459,693.60x = 143,065,374,742.08
  5. Step 5: Solve for x
    x = 143,065,374,742.08/459,693.60
  6. Step 6: Final answer
    x = 311,218.98

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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.