Home / 728,838.28-1,005,790.08-402,154.30

Finding the Fourth Proportional to 728,838.28, 1,005,790.08 and 402,154.30

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Solution

The fourth proportional to 728,838.28, 1,005,790.08 and 402,154.30 is: 554,969.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,838.28 : 1,005,790.08 = 402,154.30 : x
  2. Step 2: Convert to fraction form
    728,838.28/1,005,790.08 = 402,154.30/x
  3. Step 3: Cross multiply
    728,838.28x = 1,005,790.08 × 402,154.30
  4. Step 4: Simplify right side
    728,838.28x = 404,482,805,569.34
  5. Step 5: Solve for x
    x = 404,482,805,569.34/728,838.28
  6. Step 6: Final answer
    x = 554,969.21

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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.