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Finding the Fourth Proportional to 620,364.80, 856,323.40 and 375,362.19

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Solution

The fourth proportional to 620,364.80, 856,323.40 and 375,362.19 is: 518,132.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,364.80 : 856,323.40 = 375,362.19 : x
  2. Step 2: Convert to fraction form
    620,364.80/856,323.40 = 375,362.19/x
  3. Step 3: Cross multiply
    620,364.80x = 856,323.40 × 375,362.19
  4. Step 4: Simplify right side
    620,364.80x = 321,431,426,772.25
  5. Step 5: Solve for x
    x = 321,431,426,772.25/620,364.80
  6. Step 6: Final answer
    x = 518,132.92

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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.