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Finding the Fourth Proportional to 614,390.40, 920,030.40 and 489,974.40

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Solution

The fourth proportional to 614,390.40, 920,030.40 and 489,974.40 is: 733,721.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,390.40 : 920,030.40 = 489,974.40 : x
  2. Step 2: Convert to fraction form
    614,390.40/920,030.40 = 489,974.40/x
  3. Step 3: Cross multiply
    614,390.40x = 920,030.40 × 489,974.40
  4. Step 4: Simplify right side
    614,390.40x = 450,791,343,221.76
  5. Step 5: Solve for x
    x = 450,791,343,221.76/614,390.40
  6. Step 6: Final answer
    x = 733,721.33

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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.