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Finding the Fourth Proportional to 612,721.32, 845,210.30 and 367,642.68

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Solution

The fourth proportional to 612,721.32, 845,210.30 and 367,642.68 is: 507,139.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,721.32 : 845,210.30 = 367,642.68 : x
  2. Step 2: Convert to fraction form
    612,721.32/845,210.30 = 367,642.68/x
  3. Step 3: Cross multiply
    612,721.32x = 845,210.30 × 367,642.68
  4. Step 4: Simplify right side
    612,721.32x = 310,735,378,017.39
  5. Step 5: Solve for x
    x = 310,735,378,017.39/612,721.32
  6. Step 6: Final answer
    x = 507,139.82

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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.