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Finding the Fourth Proportional to 607,421.40, 911,132.10 and 430,128.60

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Solution

The fourth proportional to 607,421.40, 911,132.10 and 430,128.60 is: 645,192.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,421.40 : 911,132.10 = 430,128.60 : x
  2. Step 2: Convert to fraction form
    607,421.40/911,132.10 = 430,128.60/x
  3. Step 3: Cross multiply
    607,421.40x = 911,132.10 × 430,128.60
  4. Step 4: Simplify right side
    607,421.40x = 391,903,974,588.06
  5. Step 5: Solve for x
    x = 391,903,974,588.06/607,421.40
  6. Step 6: Final answer
    x = 645,192.90

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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.