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Finding the Fourth Proportional to 659,740.60, 989,610.90 and 393,801.40

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Solution

The fourth proportional to 659,740.60, 989,610.90 and 393,801.40 is: 590,702.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,740.60 : 989,610.90 = 393,801.40 : x
  2. Step 2: Convert to fraction form
    659,740.60/989,610.90 = 393,801.40/x
  3. Step 3: Cross multiply
    659,740.60x = 989,610.90 × 393,801.40
  4. Step 4: Simplify right side
    659,740.60x = 389,710,157,875.26
  5. Step 5: Solve for x
    x = 389,710,157,875.26/659,740.60
  6. Step 6: Final answer
    x = 590,702.10

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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.