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Finding the Fourth Proportional to 858,509.60, 1,288,347.60 and 479,429.60

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Solution

The fourth proportional to 858,509.60, 1,288,347.60 and 479,429.60 is: 719,470.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,509.60 : 1,288,347.60 = 479,429.60 : x
  2. Step 2: Convert to fraction form
    858,509.60/1,288,347.60 = 479,429.60/x
  3. Step 3: Cross multiply
    858,509.60x = 1,288,347.60 × 479,429.60
  4. Step 4: Simplify right side
    858,509.60x = 617,671,974,528.96
  5. Step 5: Solve for x
    x = 617,671,974,528.96/858,509.60
  6. Step 6: Final answer
    x = 719,470.08

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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.