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Finding the Fourth Proportional to 432,101.40, 646,985.70 and 432,101.40

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Solution

The fourth proportional to 432,101.40, 646,985.70 and 432,101.40 is: 646,985.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,101.40 : 646,985.70 = 432,101.40 : x
  2. Step 2: Convert to fraction form
    432,101.40/646,985.70 = 432,101.40/x
  3. Step 3: Cross multiply
    432,101.40x = 646,985.70 × 432,101.40
  4. Step 4: Simplify right side
    432,101.40x = 279,563,426,749.98
  5. Step 5: Solve for x
    x = 279,563,426,749.98/432,101.40
  6. Step 6: Final answer
    x = 646,985.70

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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.