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Finding the Fourth Proportional to 526,722.40, 790,083.60 and 421,746.40

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Solution

The fourth proportional to 526,722.40, 790,083.60 and 421,746.40 is: 632,619.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,722.40 : 790,083.60 = 421,746.40 : x
  2. Step 2: Convert to fraction form
    526,722.40/790,083.60 = 421,746.40/x
  3. Step 3: Cross multiply
    526,722.40x = 790,083.60 × 421,746.40
  4. Step 4: Simplify right side
    526,722.40x = 333,214,913,999.04
  5. Step 5: Solve for x
    x = 333,214,913,999.04/526,722.40
  6. Step 6: Final answer
    x = 632,619.60

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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.