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Finding the Fourth Proportional to 677,528, 934,921.44 and 391,140.48

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Solution

The fourth proportional to 677,528, 934,921.44 and 391,140.48 is: 539,735.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,528 : 934,921.44 = 391,140.48 : x
  2. Step 2: Convert to fraction form
    677,528/934,921.44 = 391,140.48/x
  3. Step 3: Cross multiply
    677,528x = 934,921.44 × 391,140.48
  4. Step 4: Simplify right side
    677,528x = 365,685,620,803.89
  5. Step 5: Solve for x
    x = 365,685,620,803.89/677,528
  6. Step 6: Final answer
    x = 539,735.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.