Home / 820,547.15-1,230,426.86-387,904.41

Finding the Fourth Proportional to 820,547.15, 1,230,426.86 and 387,904.41

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Solution

The fourth proportional to 820,547.15, 1,230,426.86 and 387,904.41 is: 581,670.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,547.15 : 1,230,426.86 = 387,904.41 : x
  2. Step 2: Convert to fraction form
    820,547.15/1,230,426.86 = 387,904.41/x
  3. Step 3: Cross multiply
    820,547.15x = 1,230,426.86 × 387,904.41
  4. Step 4: Simplify right side
    820,547.15x = 477,288,003,236.93
  5. Step 5: Solve for x
    x = 477,288,003,236.93/820,547.15
  6. Step 6: Final answer
    x = 581,670.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.