Home / 921,657.60-1,382,680.80-388,904.40

Finding the Fourth Proportional to 921,657.60, 1,382,680.80 and 388,904.40

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Solution

The fourth proportional to 921,657.60, 1,382,680.80 and 388,904.40 is: 583,438.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,657.60 : 1,382,680.80 = 388,904.40 : x
  2. Step 2: Convert to fraction form
    921,657.60/1,382,680.80 = 388,904.40/x
  3. Step 3: Cross multiply
    921,657.60x = 1,382,680.80 × 388,904.40
  4. Step 4: Simplify right side
    921,657.60x = 537,730,646,915.52
  5. Step 5: Solve for x
    x = 537,730,646,915.52/921,657.60
  6. Step 6: Final answer
    x = 583,438.63

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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.