Home / 438,425.10-657,637.65-318,869.10

Finding the Fourth Proportional to 438,425.10, 657,637.65 and 318,869.10

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Solution

The fourth proportional to 438,425.10, 657,637.65 and 318,869.10 is: 478,303.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,425.10 : 657,637.65 = 318,869.10 : x
  2. Step 2: Convert to fraction form
    438,425.10/657,637.65 = 318,869.10/x
  3. Step 3: Cross multiply
    438,425.10x = 657,637.65 × 318,869.10
  4. Step 4: Simplify right side
    438,425.10x = 209,700,325,581.62
  5. Step 5: Solve for x
    x = 209,700,325,581.62/438,425.10
  6. Step 6: Final answer
    x = 478,303.65

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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.