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Finding the Fourth Proportional to 612,657.90, 845,418.90 and 340,726.32

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Solution

The fourth proportional to 612,657.90, 845,418.90 and 340,726.32 is: 470,175.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,657.90 : 845,418.90 = 340,726.32 : x
  2. Step 2: Convert to fraction form
    612,657.90/845,418.90 = 340,726.32/x
  3. Step 3: Cross multiply
    612,657.90x = 845,418.90 × 340,726.32
  4. Step 4: Simplify right side
    612,657.90x = 288,056,470,655.45
  5. Step 5: Solve for x
    x = 288,056,470,655.45/612,657.90
  6. Step 6: Final answer
    x = 470,175.07

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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.