Home / 839,487.60-1,258,545.24-390,488.40

Finding the Fourth Proportional to 839,487.60, 1,258,545.24 and 390,488.40

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Solution

The fourth proportional to 839,487.60, 1,258,545.24 and 390,488.40 is: 585,413.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,487.60 : 1,258,545.24 = 390,488.40 : x
  2. Step 2: Convert to fraction form
    839,487.60/1,258,545.24 = 390,488.40/x
  3. Step 3: Cross multiply
    839,487.60x = 1,258,545.24 × 390,488.40
  4. Step 4: Simplify right side
    839,487.60x = 491,447,317,095.22
  5. Step 5: Solve for x
    x = 491,447,317,095.22/839,487.60
  6. Step 6: Final answer
    x = 585,413.43

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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.