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Finding the Fourth Proportional to 343,466.40, 515,199.60 and 260,522.40

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Solution

The fourth proportional to 343,466.40, 515,199.60 and 260,522.40 is: 390,783.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,466.40 : 515,199.60 = 260,522.40 : x
  2. Step 2: Convert to fraction form
    343,466.40/515,199.60 = 260,522.40/x
  3. Step 3: Cross multiply
    343,466.40x = 515,199.60 × 260,522.40
  4. Step 4: Simplify right side
    343,466.40x = 134,221,036,271.04
  5. Step 5: Solve for x
    x = 134,221,036,271.04/343,466.40
  6. Step 6: Final answer
    x = 390,783.60

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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.