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Finding the Fourth Proportional to 612,490.56, 845,288.64 and 340,578.24

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Solution

The fourth proportional to 612,490.56, 845,288.64 and 340,578.24 is: 470,026.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,490.56 : 845,288.64 = 340,578.24 : x
  2. Step 2: Convert to fraction form
    612,490.56/845,288.64 = 340,578.24/x
  3. Step 3: Cross multiply
    612,490.56x = 845,288.64 × 340,578.24
  4. Step 4: Simplify right side
    612,490.56x = 287,886,917,303.19
  5. Step 5: Solve for x
    x = 287,886,917,303.19/612,490.56
  6. Step 6: Final answer
    x = 470,026.70

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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.