Home / 679,987.20-1,019,689.20-342,897.60

Finding the Fourth Proportional to 679,987.20, 1,019,689.20 and 342,897.60

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Solution

The fourth proportional to 679,987.20, 1,019,689.20 and 342,897.60 is: 514,199.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,987.20 : 1,019,689.20 = 342,897.60 : x
  2. Step 2: Convert to fraction form
    679,987.20/1,019,689.20 = 342,897.60/x
  3. Step 3: Cross multiply
    679,987.20x = 1,019,689.20 × 342,897.60
  4. Step 4: Simplify right side
    679,987.20x = 349,648,979,425.92
  5. Step 5: Solve for x
    x = 349,648,979,425.92/679,987.20
  6. Step 6: Final answer
    x = 514,199.35

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Double scale
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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.