Home / 628,639.19-867,521.42-342,158.60

Finding the Fourth Proportional to 628,639.19, 867,521.42 and 342,158.60

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Solution

The fourth proportional to 628,639.19, 867,521.42 and 342,158.60 is: 472,178.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,639.19 : 867,521.42 = 342,158.60 : x
  2. Step 2: Convert to fraction form
    628,639.19/867,521.42 = 342,158.60/x
  3. Step 3: Cross multiply
    628,639.19x = 867,521.42 × 342,158.60
  4. Step 4: Simplify right side
    628,639.19x = 296,829,911,055.00
  5. Step 5: Solve for x
    x = 296,829,911,055.00/628,639.19
  6. Step 6: Final answer
    x = 472,178.50

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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.