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Finding the Fourth Proportional to 459,559.40, 689,900.70 and 260,018.60

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Solution

The fourth proportional to 459,559.40, 689,900.70 and 260,018.60 is: 390,345.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,559.40 : 689,900.70 = 260,018.60 : x
  2. Step 2: Convert to fraction form
    459,559.40/689,900.70 = 260,018.60/x
  3. Step 3: Cross multiply
    459,559.40x = 689,900.70 × 260,018.60
  4. Step 4: Simplify right side
    459,559.40x = 179,387,014,153.02
  5. Step 5: Solve for x
    x = 179,387,014,153.02/459,559.40
  6. Step 6: Final answer
    x = 390,345.65

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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.