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Finding the Fourth Proportional to 423,095.20, 634,642.80 and 403,412.20

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Solution

The fourth proportional to 423,095.20, 634,642.80 and 403,412.20 is: 605,118.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,095.20 : 634,642.80 = 403,412.20 : x
  2. Step 2: Convert to fraction form
    423,095.20/634,642.80 = 403,412.20/x
  3. Step 3: Cross multiply
    423,095.20x = 634,642.80 × 403,412.20
  4. Step 4: Simplify right side
    423,095.20x = 256,022,648,162.16
  5. Step 5: Solve for x
    x = 256,022,648,162.16/423,095.20
  6. Step 6: Final answer
    x = 605,118.30

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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.