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Finding the Fourth Proportional to 291,697.20, 437,718.60 and 212,612.40

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Solution

The fourth proportional to 291,697.20, 437,718.60 and 212,612.40 is: 319,044.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,697.20 : 437,718.60 = 212,612.40 : x
  2. Step 2: Convert to fraction form
    291,697.20/437,718.60 = 212,612.40/x
  3. Step 3: Cross multiply
    291,697.20x = 437,718.60 × 212,612.40
  4. Step 4: Simplify right side
    291,697.20x = 93,064,402,070.64
  5. Step 5: Solve for x
    x = 93,064,402,070.64/291,697.20
  6. Step 6: Final answer
    x = 319,044.55

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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.