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Finding the Fourth Proportional to 526,907.60, 790,361.40 and 421,931.60

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Solution

The fourth proportional to 526,907.60, 790,361.40 and 421,931.60 is: 632,897.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,907.60 : 790,361.40 = 421,931.60 : x
  2. Step 2: Convert to fraction form
    526,907.60/790,361.40 = 421,931.60/x
  3. Step 3: Cross multiply
    526,907.60x = 790,361.40 × 421,931.60
  4. Step 4: Simplify right side
    526,907.60x = 333,478,450,080.24
  5. Step 5: Solve for x
    x = 333,478,450,080.24/526,907.60
  6. Step 6: Final answer
    x = 632,897.40

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Double scale
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Similar ratio
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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.