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Finding the Fourth Proportional to 423,878.40, 584,323.20 and 310,521.60

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Solution

The fourth proportional to 423,878.40, 584,323.20 and 310,521.60 is: 428,059.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,878.40 : 584,323.20 = 310,521.60 : x
  2. Step 2: Convert to fraction form
    423,878.40/584,323.20 = 310,521.60/x
  3. Step 3: Cross multiply
    423,878.40x = 584,323.20 × 310,521.60
  4. Step 4: Simplify right side
    423,878.40x = 181,444,974,981.12
  5. Step 5: Solve for x
    x = 181,444,974,981.12/423,878.40
  6. Step 6: Final answer
    x = 428,059.03

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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.