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Finding the Fourth Proportional to 612,705.60, 845,408.58 and 358,007.56

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Solution

The fourth proportional to 612,705.60, 845,408.58 and 358,007.56 is: 493,977.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,705.60 : 845,408.58 = 358,007.56 : x
  2. Step 2: Convert to fraction form
    612,705.60/845,408.58 = 358,007.56/x
  3. Step 3: Cross multiply
    612,705.60x = 845,408.58 × 358,007.56
  4. Step 4: Simplify right side
    612,705.60x = 302,662,662,928.87
  5. Step 5: Solve for x
    x = 302,662,662,928.87/612,705.60
  6. Step 6: Final answer
    x = 493,977.31

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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.